{
  "status": "completed",
  "applicable_count": 1,
  "completed_count": 1,
  "failed_count": 0,
  "schema_version": 1,
  "config_hash": "5d2891ceb277be8d",
  "data": {
    "overlays": {
      "L01B02": {
        "bg_id": "L01B02",
        "fp_id": "fp_l01_dressing_room",
        "use_numbered_elements": [
          1,
          2,
          5,
          8,
          9,
          10,
          11,
          12
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "dressing room",
            "category": "area",
            "position_hint": "west side of plan, compact enclosed private room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "backstage corridor",
            "category": "area",
            "position_hint": "central narrow route running east from the dressing room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "dressing-room door",
            "category": "opening",
            "position_hint": "east wall of dressing room, opening into the backstage corridor",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "seating bench",
            "category": "furniture",
            "position_hint": "south wall of dressing room",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "straight chair",
            "category": "furniture",
            "position_hint": "near the dressing counter in the north half of the dressing room",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "wall mirror",
            "category": "prop",
            "position_hint": "north wall of dressing room above the counter",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "dressing counter",
            "category": "furniture",
            "position_hint": "against north wall of dressing room below the mirror",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "clothing rail and hooks",
            "category": "prop",
            "position_hint": "west wall of dressing room",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L01B01": {
        "bg_id": "L01B01",
        "fp_id": "fp_l01_dressing_room",
        "use_numbered_elements": [
          2,
          3,
          4,
          5,
          6,
          7,
          13
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 2,
            "label": "backstage corridor",
            "category": "area",
            "position_hint": "central narrow route running east from the dressing room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "stage-side wing",
            "category": "area",
            "position_hint": "east end of corridor beside the stage opening",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "stage threshold",
            "category": "area",
            "position_hint": "far east edge beyond the stage-side wing",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "dressing-room door",
            "category": "opening",
            "position_hint": "east wall of dressing room, opening into the backstage corridor",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "wing passage",
            "category": "opening",
            "position_hint": "east end of backstage corridor, open connection to stage-side wing",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "stage opening",
            "category": "opening",
            "position_hint": "east side of stage-side wing, opening toward the stage threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "masking curtain",
            "category": "prop",
            "position_hint": "stage-side edge of the wing beside the stage opening",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B01": {
        "bg_id": "L04B01",
        "fp_id": "fp_l04_auditorium",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          8,
          9,
          10,
          11,
          12,
          13
        ],
        "ignore_numbered_elements": [
          6,
          7,
          14,
          15,
          16,
          17,
          18,
          19,
          20,
          21,
          22,
          23,
          24,
          25
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "stage area",
            "category": "area",
            "position_hint": "north end of the rectangular auditorium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "audience area",
            "category": "area",
            "position_hint": "central and southern portion facing the stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "rear threshold",
            "category": "area",
            "position_hint": "south center behind the seating blocks",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "left audience aisle",
            "category": "area",
            "position_hint": "west side of the audience seating",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "right audience aisle",
            "category": "area",
            "position_hint": "east side of the audience seating",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "rear entrance door",
            "category": "opening",
            "position_hint": "south wall at the rear aisle threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "side-stage access opening",
            "category": "opening",
            "position_hint": "west side of the stage near the backstage edge",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "stage edge and access step",
            "category": "prop",
            "position_hint": "along the south edge of the stage facing the audience",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 11,
            "label": "construction materials",
            "category": "prop",
            "position_hint": "temporarily distributed across the stage and front audience area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "temporary seating",
            "category": "furniture",
            "position_hint": "temporary rows in the central audience area during construction",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "construction workers",
            "category": "prop",
            "position_hint": "working on and immediately in front of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 14,
            "label": "central performance chair",
            "category": "furniture",
            "position_hint": "center of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "wired microphone and stand",
            "category": "prop",
            "position_hint": "center stage directly in front of the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "music stand with paper scores",
            "category": "furniture",
            "position_hint": "stage center, slightly beside the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "packed audience",
            "category": "prop",
            "position_hint": "occupying both completed seating blocks",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "bright stage-light state",
            "category": "area",
            "position_hint": "concentrated over the center and front of the stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "raised lit candle",
            "category": "prop",
            "position_hint": "on the stage near the central performance position",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "power outage darkness",
            "category": "area",
            "position_hint": "across the entire stage and auditorium",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "rear door open state",
            "category": "opening",
            "position_hint": "at the rear entrance door on the south wall",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "raincoat-clad latecomer",
            "category": "prop",
            "position_hint": "entering from the rear door into an audience aisle",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "labeled cassette insert",
            "category": "prop",
            "position_hint": "isolated close-up insert outside the auditorium composition",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 24,
            "label": "acoustic guitar and harmonica",
            "category": "prop",
            "position_hint": "at the central performance chair on the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "analog amplifier and stage speakers",
            "category": "prop",
            "position_hint": "near the sides and rear of the stage performance area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "marker #6 in ignore_numbered_elements is a base layer marker ('base_persistent_furniture'); structural elements normally remain in use",
          "marker #7 in ignore_numbered_elements is a base layer marker ('base_persistent_furniture'); structural elements normally remain in use",
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B03": {
        "bg_id": "L04B03",
        "fp_id": "fp_l04_auditorium",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          14,
          15,
          16,
          17,
          18,
          24,
          25
        ],
        "ignore_numbered_elements": [
          11,
          12,
          13,
          19,
          20,
          21,
          22,
          23
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "stage area",
            "category": "area",
            "position_hint": "north end of the rectangular auditorium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "audience area",
            "category": "area",
            "position_hint": "central and southern portion facing the stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "rear threshold",
            "category": "area",
            "position_hint": "south center behind the seating blocks",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "left audience aisle",
            "category": "area",
            "position_hint": "west side of the audience seating",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "right audience aisle",
            "category": "area",
            "position_hint": "east side of the audience seating",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "left seating block",
            "category": "furniture",
            "position_hint": "west half of the audience area, rows facing north",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "right seating block",
            "category": "furniture",
            "position_hint": "east half of the audience area, rows facing north",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "rear entrance door",
            "category": "opening",
            "position_hint": "south wall at the rear aisle threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "side-stage access opening",
            "category": "opening",
            "position_hint": "west side of the stage near the backstage edge",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "stage edge and access step",
            "category": "prop",
            "position_hint": "along the south edge of the stage facing the audience",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "central performance chair",
            "category": "furniture",
            "position_hint": "center of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "wired microphone and stand",
            "category": "prop",
            "position_hint": "center stage directly in front of the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "music stand with paper scores",
            "category": "furniture",
            "position_hint": "stage center, slightly beside the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "packed audience",
            "category": "prop",
            "position_hint": "occupying both completed seating blocks",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "bright stage-light state",
            "category": "area",
            "position_hint": "concentrated over the center and front of the stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 24,
            "label": "acoustic guitar and harmonica",
            "category": "prop",
            "position_hint": "at the central performance chair on the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "analog amplifier and stage speakers",
            "category": "prop",
            "position_hint": "near the sides and rear of the stage performance area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 11,
            "label": "construction materials",
            "category": "prop",
            "position_hint": "temporarily distributed across the stage and front audience area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "temporary seating",
            "category": "furniture",
            "position_hint": "temporary rows in the central audience area during construction",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "construction workers",
            "category": "prop",
            "position_hint": "working on and immediately in front of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "raised lit candle",
            "category": "prop",
            "position_hint": "on the stage near the central performance position",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "power outage darkness",
            "category": "area",
            "position_hint": "across the entire stage and auditorium",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "rear door open state",
            "category": "opening",
            "position_hint": "at the rear entrance door on the south wall",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "raincoat-clad latecomer",
            "category": "prop",
            "position_hint": "entering from the rear door into an audience aisle",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "labeled cassette insert",
            "category": "prop",
            "position_hint": "isolated close-up insert outside the auditorium composition",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B05": {
        "bg_id": "L04B05",
        "fp_id": "fp_l04_auditorium",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          14,
          15,
          16,
          17,
          19,
          20,
          24,
          25
        ],
        "ignore_numbered_elements": [
          11,
          12,
          13,
          18,
          21,
          22,
          23
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "stage area",
            "category": "area",
            "position_hint": "north end of the rectangular auditorium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "audience area",
            "category": "area",
            "position_hint": "central and southern portion facing the stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "rear threshold",
            "category": "area",
            "position_hint": "south center behind the seating blocks",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "left audience aisle",
            "category": "area",
            "position_hint": "west side of the audience seating",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "right audience aisle",
            "category": "area",
            "position_hint": "east side of the audience seating",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "left seating block",
            "category": "furniture",
            "position_hint": "west half of the audience area, rows facing north",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "right seating block",
            "category": "furniture",
            "position_hint": "east half of the audience area, rows facing north",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "rear entrance door",
            "category": "opening",
            "position_hint": "south wall at the rear aisle threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "side-stage access opening",
            "category": "opening",
            "position_hint": "west side of the stage near the backstage edge",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "stage edge and access step",
            "category": "prop",
            "position_hint": "along the south edge of the stage facing the audience",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "central performance chair",
            "category": "furniture",
            "position_hint": "center of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "wired microphone and stand",
            "category": "prop",
            "position_hint": "center stage directly in front of the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "music stand with paper scores",
            "category": "furniture",
            "position_hint": "stage center, slightly beside the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "packed audience",
            "category": "prop",
            "position_hint": "occupying both completed seating blocks",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "raised lit candle",
            "category": "prop",
            "position_hint": "on the stage near the central performance position",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "power outage darkness",
            "category": "area",
            "position_hint": "across the entire stage and auditorium",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 24,
            "label": "acoustic guitar and harmonica",
            "category": "prop",
            "position_hint": "at the central performance chair on the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "analog amplifier and stage speakers",
            "category": "prop",
            "position_hint": "near the sides and rear of the stage performance area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 11,
            "label": "construction materials",
            "category": "prop",
            "position_hint": "temporarily distributed across the stage and front audience area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "temporary seating",
            "category": "furniture",
            "position_hint": "temporary rows in the central audience area during construction",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "construction workers",
            "category": "prop",
            "position_hint": "working on and immediately in front of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "bright stage-light state",
            "category": "area",
            "position_hint": "concentrated over the center and front of the stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "rear door open state",
            "category": "opening",
            "position_hint": "at the rear entrance door on the south wall",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "raincoat-clad latecomer",
            "category": "prop",
            "position_hint": "entering from the rear door into an audience aisle",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "labeled cassette insert",
            "category": "prop",
            "position_hint": "isolated close-up insert outside the auditorium composition",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B02": {
        "bg_id": "L04B02",
        "fp_id": "fp_l04_auditorium",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          14,
          15,
          16,
          17,
          18,
          21,
          22,
          24,
          25
        ],
        "ignore_numbered_elements": [
          11,
          12,
          13,
          19,
          20,
          23
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "stage area",
            "category": "area",
            "position_hint": "north end of the rectangular auditorium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "audience area",
            "category": "area",
            "position_hint": "central and southern portion facing the stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "rear threshold",
            "category": "area",
            "position_hint": "south center behind the seating blocks",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "left audience aisle",
            "category": "area",
            "position_hint": "west side of the audience seating",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "right audience aisle",
            "category": "area",
            "position_hint": "east side of the audience seating",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "left seating block",
            "category": "furniture",
            "position_hint": "west half of the audience area, rows facing north",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "right seating block",
            "category": "furniture",
            "position_hint": "east half of the audience area, rows facing north",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "rear entrance door",
            "category": "opening",
            "position_hint": "south wall at the rear aisle threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "side-stage access opening",
            "category": "opening",
            "position_hint": "west side of the stage near the backstage edge",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "stage edge and access step",
            "category": "prop",
            "position_hint": "along the south edge of the stage facing the audience",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "central performance chair",
            "category": "furniture",
            "position_hint": "center of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "wired microphone and stand",
            "category": "prop",
            "position_hint": "center stage directly in front of the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "music stand with paper scores",
            "category": "furniture",
            "position_hint": "stage center, slightly beside the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "packed audience",
            "category": "prop",
            "position_hint": "occupying both completed seating blocks",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "bright stage-light state",
            "category": "area",
            "position_hint": "concentrated over the center and front of the stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "rear door open state",
            "category": "opening",
            "position_hint": "at the rear entrance door on the south wall",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "raincoat-clad latecomer",
            "category": "prop",
            "position_hint": "entering from the rear door into an audience aisle",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 24,
            "label": "acoustic guitar and harmonica",
            "category": "prop",
            "position_hint": "at the central performance chair on the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "analog amplifier and stage speakers",
            "category": "prop",
            "position_hint": "near the sides and rear of the stage performance area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 11,
            "label": "construction materials",
            "category": "prop",
            "position_hint": "temporarily distributed across the stage and front audience area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "temporary seating",
            "category": "furniture",
            "position_hint": "temporary rows in the central audience area during construction",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "construction workers",
            "category": "prop",
            "position_hint": "working on and immediately in front of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "raised lit candle",
            "category": "prop",
            "position_hint": "on the stage near the central performance position",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "power outage darkness",
            "category": "area",
            "position_hint": "across the entire stage and auditorium",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "labeled cassette insert",
            "category": "prop",
            "position_hint": "isolated close-up insert outside the auditorium composition",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B04": {
        "bg_id": "L04B04",
        "fp_id": "fp_l04_auditorium",
        "use_numbered_elements": [
          23
        ],
        "ignore_numbered_elements": [
          11,
          12,
          13,
          14,
          15,
          16,
          17,
          18,
          19,
          20,
          21,
          22,
          24,
          25
        ],
        "base_markers_to_reference": [],
        "transient_markers_to_describe": [
          {
            "number": 23,
            "label": "labeled cassette insert",
            "category": "prop",
            "position_hint": "isolated close-up insert outside the auditorium composition",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 11,
            "label": "construction materials",
            "category": "prop",
            "position_hint": "temporarily distributed across the stage and front audience area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "temporary seating",
            "category": "furniture",
            "position_hint": "temporary rows in the central audience area during construction",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "construction workers",
            "category": "prop",
            "position_hint": "working on and immediately in front of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "central performance chair",
            "category": "furniture",
            "position_hint": "center of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "wired microphone and stand",
            "category": "prop",
            "position_hint": "center stage directly in front of the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "music stand with paper scores",
            "category": "furniture",
            "position_hint": "stage center, slightly beside the performance chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "packed audience",
            "category": "prop",
            "position_hint": "occupying both completed seating blocks",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "bright stage-light state",
            "category": "area",
            "position_hint": "concentrated over the center and front of the stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "raised lit candle",
            "category": "prop",
            "position_hint": "on the stage near the central performance position",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "power outage darkness",
            "category": "area",
            "position_hint": "across the entire stage and auditorium",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "rear door open state",
            "category": "opening",
            "position_hint": "at the rear entrance door on the south wall",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "raincoat-clad latecomer",
            "category": "prop",
            "position_hint": "entering from the rear door into an audience aisle",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 24,
            "label": "acoustic guitar and harmonica",
            "category": "prop",
            "position_hint": "at the central performance chair on the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "analog amplifier and stage speakers",
            "category": "prop",
            "position_hint": "near the sides and rear of the stage performance area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "no base_structural_unit marker in use_numbered_elements; dominant_target_unit_marker_number left empty"
        ]
      },
      "L06B04": {
        "bg_id": "L06B04",
        "fp_id": "fp_l06_shop_interior",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          15
        ],
        "ignore_numbered_elements": [
          14,
          16,
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "customer zone",
            "category": "area",
            "position_hint": "central front half of the narrow shop",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "repair service zone",
            "category": "area",
            "position_hint": "rear third of the shop around the workbench",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "storage zone",
            "category": "area",
            "position_hint": "long side strip beside the shelf bank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "seating zone",
            "category": "area",
            "position_hint": "front-side corner containing the sofa and small table",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "entrance threshold zone",
            "category": "area",
            "position_hint": "street-facing edge immediately inside the doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "street entrance door",
            "category": "opening",
            "position_hint": "south wall near one corner of the storefront",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "storefront display window",
            "category": "opening",
            "position_hint": "south wall beside the street entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "repair workbench",
            "category": "furniture",
            "position_hint": "against the rear wall in the repair service zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "equipment shelf bank",
            "category": "furniture",
            "position_hint": "along one long side wall, turning slightly across the rear corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "shelved analog repair stock",
            "category": "prop",
            "position_hint": "integrated across the equipment shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "fixed wall display rail",
            "category": "prop",
            "position_hint": "on the long wall opposite the main shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "small table",
            "category": "furniture",
            "position_hint": "inside the side seating zone in front of the sofa",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "worn sofa",
            "category": "furniture",
            "position_hint": "against the side wall in the seating zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "radio under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the morning scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 14,
            "label": "framed success clippings",
            "category": "prop",
            "position_hint": "mounted on the fixed wall display rail in later daytime and night scenes",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "fan under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the later daytime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "private drink setting",
            "category": "prop",
            "position_hint": "temporarily arranged on the small table during the closed-shop night scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L06B03": {
        "bg_id": "L06B03",
        "fp_id": "fp_l06_shop_interior",
        "use_numbered_elements": [
          1,
          3,
          4,
          8,
          9,
          10,
          11,
          14,
          16
        ],
        "ignore_numbered_elements": [
          15,
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "customer zone",
            "category": "area",
            "position_hint": "central front half of the narrow shop",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "storage zone",
            "category": "area",
            "position_hint": "long side strip beside the shelf bank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "seating zone",
            "category": "area",
            "position_hint": "front-side corner containing the sofa and small table",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "repair workbench",
            "category": "furniture",
            "position_hint": "against the rear wall in the repair service zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "equipment shelf bank",
            "category": "furniture",
            "position_hint": "along one long side wall, turning slightly across the rear corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "shelved analog repair stock",
            "category": "prop",
            "position_hint": "integrated across the equipment shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "fixed wall display rail",
            "category": "prop",
            "position_hint": "on the long wall opposite the main shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "framed success clippings",
            "category": "prop",
            "position_hint": "mounted on the fixed wall display rail in later daytime and night scenes",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "fan under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the later daytime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "radio under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the morning scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "private drink setting",
            "category": "prop",
            "position_hint": "temporarily arranged on the small table during the closed-shop night scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L06B02": {
        "bg_id": "L06B02",
        "fp_id": "fp_l06_shop_interior",
        "use_numbered_elements": [
          1,
          3,
          8,
          9,
          11,
          14
        ],
        "ignore_numbered_elements": [
          15,
          16,
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "customer zone",
            "category": "area",
            "position_hint": "central front half of the narrow shop",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "storage zone",
            "category": "area",
            "position_hint": "long side strip beside the shelf bank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "repair workbench",
            "category": "furniture",
            "position_hint": "against the rear wall in the repair service zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "equipment shelf bank",
            "category": "furniture",
            "position_hint": "along one long side wall, turning slightly across the rear corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "fixed wall display rail",
            "category": "prop",
            "position_hint": "on the long wall opposite the main shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "framed success clippings",
            "category": "prop",
            "position_hint": "mounted on the fixed wall display rail in later daytime and night scenes",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "radio under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the morning scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "fan under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the later daytime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "private drink setting",
            "category": "prop",
            "position_hint": "temporarily arranged on the small table during the closed-shop night scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L06B01": {
        "bg_id": "L06B01",
        "fp_id": "fp_l06_shop_interior",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14
        ],
        "ignore_numbered_elements": [
          15,
          16,
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "customer zone",
            "category": "area",
            "position_hint": "central front half of the narrow shop",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "repair service zone",
            "category": "area",
            "position_hint": "rear third of the shop around the workbench",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "storage zone",
            "category": "area",
            "position_hint": "long side strip beside the shelf bank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "seating zone",
            "category": "area",
            "position_hint": "front-side corner containing the sofa and small table",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "entrance threshold zone",
            "category": "area",
            "position_hint": "street-facing edge immediately inside the doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "street entrance door",
            "category": "opening",
            "position_hint": "south wall near one corner of the storefront",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "storefront display window",
            "category": "opening",
            "position_hint": "south wall beside the street entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "repair workbench",
            "category": "furniture",
            "position_hint": "against the rear wall in the repair service zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "equipment shelf bank",
            "category": "furniture",
            "position_hint": "along one long side wall, turning slightly across the rear corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "shelved analog repair stock",
            "category": "prop",
            "position_hint": "integrated across the equipment shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "fixed wall display rail",
            "category": "prop",
            "position_hint": "on the long wall opposite the main shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "small table",
            "category": "furniture",
            "position_hint": "inside the side seating zone in front of the sofa",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "worn sofa",
            "category": "furniture",
            "position_hint": "against the side wall in the seating zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "framed success clippings",
            "category": "prop",
            "position_hint": "mounted on the fixed wall display rail in later daytime and night scenes",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "radio under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the morning scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "fan under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the later daytime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "private drink setting",
            "category": "prop",
            "position_hint": "temporarily arranged on the small table during the closed-shop night scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L06B06": {
        "bg_id": "L06B06",
        "fp_id": "fp_l06_shop_interior",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          6,
          7,
          8,
          9,
          11,
          12,
          13,
          14,
          17
        ],
        "ignore_numbered_elements": [
          15,
          16
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "customer zone",
            "category": "area",
            "position_hint": "central front half of the narrow shop",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "repair service zone",
            "category": "area",
            "position_hint": "rear third of the shop around the workbench",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "storage zone",
            "category": "area",
            "position_hint": "long side strip beside the shelf bank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "seating zone",
            "category": "area",
            "position_hint": "front-side corner containing the sofa and small table",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "street entrance door",
            "category": "opening",
            "position_hint": "south wall near one corner of the storefront",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "storefront display window",
            "category": "opening",
            "position_hint": "south wall beside the street entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "repair workbench",
            "category": "furniture",
            "position_hint": "against the rear wall in the repair service zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "equipment shelf bank",
            "category": "furniture",
            "position_hint": "along one long side wall, turning slightly across the rear corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "fixed wall display rail",
            "category": "prop",
            "position_hint": "on the long wall opposite the main shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "small table",
            "category": "furniture",
            "position_hint": "inside the side seating zone in front of the sofa",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "worn sofa",
            "category": "furniture",
            "position_hint": "against the side wall in the seating zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "framed success clippings",
            "category": "prop",
            "position_hint": "mounted on the fixed wall display rail in later daytime and night scenes",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "private drink setting",
            "category": "prop",
            "position_hint": "temporarily arranged on the small table during the closed-shop night scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "radio under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the morning scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "fan under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the later daytime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L06B05": {
        "bg_id": "L06B05",
        "fp_id": "fp_l06_shop_interior",
        "use_numbered_elements": [
          1,
          2,
          4,
          6,
          7,
          8,
          9,
          11,
          12,
          13,
          14
        ],
        "ignore_numbered_elements": [
          15,
          16,
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "customer zone",
            "category": "area",
            "position_hint": "central front half of the narrow shop",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "repair service zone",
            "category": "area",
            "position_hint": "rear third of the shop around the workbench",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "seating zone",
            "category": "area",
            "position_hint": "front-side corner containing the sofa and small table",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "street entrance door",
            "category": "opening",
            "position_hint": "south wall near one corner of the storefront",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "storefront display window",
            "category": "opening",
            "position_hint": "south wall beside the street entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "repair workbench",
            "category": "furniture",
            "position_hint": "against the rear wall in the repair service zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "equipment shelf bank",
            "category": "furniture",
            "position_hint": "along one long side wall, turning slightly across the rear corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "fixed wall display rail",
            "category": "prop",
            "position_hint": "on the long wall opposite the main shelf bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "small table",
            "category": "furniture",
            "position_hint": "inside the side seating zone in front of the sofa",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "worn sofa",
            "category": "furniture",
            "position_hint": "against the side wall in the seating zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "framed success clippings",
            "category": "prop",
            "position_hint": "mounted on the fixed wall display rail in later daytime and night scenes",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "radio under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the morning scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "fan under repair",
            "category": "prop",
            "position_hint": "temporarily placed on the repair workbench during the later daytime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "private drink setting",
            "category": "prop",
            "position_hint": "temporarily arranged on the small table during the closed-shop night scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L07B01": {
        "bg_id": "L07B01",
        "fp_id": "fp_l07_shop_front",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shop interior frontage",
            "category": "area",
            "position_hint": "north side of plan behind the street-facing facade",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "facade threshold",
            "category": "area",
            "position_hint": "narrow strip directly south of the shop facade",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "sidewalk",
            "category": "area",
            "position_hint": "east-west pedestrian strip between threshold and curb",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "parking apron",
            "category": "area",
            "position_hint": "south side of plan beside the sidewalk",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "shop entrance door",
            "category": "opening",
            "position_hint": "east portion of the south-facing shop facade",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "display window",
            "category": "opening",
            "position_hint": "west and central portion of the south-facing shop facade",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "facade signboard",
            "category": "prop",
            "position_hint": "centered along the shop facade line above the display frontage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "curbside drainage gutter",
            "category": "prop",
            "position_hint": "continuous narrow channel along the south edge of the sidewalk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "built-in display shelf",
            "category": "furniture",
            "position_hint": "inside number 1 directly behind number 6",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 10,
            "label": "used compact hatchback",
            "category": "prop",
            "position_hint": "parked parallel to the facade in number 4",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "removed vehicle cover",
            "category": "prop",
            "position_hint": "temporarily gathered beside number 10 in the parking apron",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "rear child safety seat",
            "category": "prop",
            "position_hint": "inside the rear seating area of number 10",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L10B01": {
        "bg_id": "L10B01",
        "fp_id": "fp_campus_plaza",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "central gathering plaza",
            "category": "area",
            "position_hint": "center of plan, broad rectangular pedestrian gathering zone",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "main approach path",
            "category": "area",
            "position_hint": "south edge, widening toward the central plaza",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance steps and threshold",
            "category": "area",
            "position_hint": "north edge of plaza, spanning the main building approach",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "main double entrance",
            "category": "opening",
            "position_hint": "north side beyond the entrance steps, centered on the plaza axis",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "planted island",
            "category": "area",
            "position_hint": "west side of the plaza, outside the primary circulation axis",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "fixed benches",
            "category": "furniture",
            "position_hint": "along the edge of the planted island, facing the plaza",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "secondary approach path",
            "category": "area",
            "position_hint": "east edge, joining the central plaza diagonally",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 8,
            "label": "club promotion groups",
            "category": "prop",
            "position_hint": "distributed across the central plaza while leaving a narrow running route",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "club promotion signs",
            "category": "prop",
            "position_hint": "clustered beside the temporary promotion groups in the central plaza",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "handheld megaphones",
            "category": "prop",
            "position_hint": "carried within the temporary promotion clusters near the main approach route",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          5,
          7
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 5, 7]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L11B01": {
        "bg_id": "L11B01",
        "fp_id": "fp_lecture_hall",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "tiered student seating zone",
            "category": "area",
            "position_hint": "central and northern majority of the lecture hall, rising toward the rear",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "front teaching zone",
            "category": "area",
            "position_hint": "south end of the lecture hall on a shallow teaching platform",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "central stepped aisle",
            "category": "area",
            "position_hint": "centerline through the tiered seating from the teaching zone to the rear",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "west stepped side aisle",
            "category": "area",
            "position_hint": "along the west wall beside the tiered desk rows",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "east stepped side aisle",
            "category": "area",
            "position_hint": "along the east wall beside the tiered desk rows and windows",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "rear west entrance",
            "category": "opening",
            "position_hint": "north wall at the upper end of the west side aisle",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "rear east entrance",
            "category": "opening",
            "position_hint": "north wall at the upper end of the east side aisle",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "wall chalkboard",
            "category": "prop",
            "position_hint": "centered on the south wall behind the teaching position",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "instructor lectern",
            "category": "furniture",
            "position_hint": "front teaching zone, slightly west of center and facing the tiers",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "fixed tiered desk rows",
            "category": "furniture",
            "position_hint": "five schematic transverse rows divided by the central and side aisles",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "front side window bay",
            "category": "opening",
            "position_hint": "east wall beside the lower seating tier",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "middle side window bay",
            "category": "opening",
            "position_hint": "east wall beside the middle seating tiers",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "rear side window bay",
            "category": "opening",
            "position_hint": "east wall beside the upper seating tier",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L12B01": {
        "bg_id": "L12B01",
        "fp_id": "fp_prominent_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "management workspace",
            "category": "area",
            "position_hint": "north half of the enclosed office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "shared transaction zone",
            "category": "area",
            "position_hint": "center and south side of the management desk",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "telephone counter zone",
            "category": "area",
            "position_hint": "narrow service alcove along the east side near the doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "southeast edge of the office at the doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "management desk",
            "category": "furniture",
            "position_hint": "slightly north of center, oriented toward the entrance and visitor zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "cathode-ray television",
            "category": "prop",
            "position_hint": "against the west wall, angled toward the desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "office doorway",
            "category": "opening",
            "position_hint": "southeast wall between the office and adjoining venue circulation",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "telephone counter",
            "category": "furniture",
            "position_hint": "east wall beside the doorway, defining the service alcove",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "wired telephone",
            "category": "prop",
            "position_hint": "on top of the telephone counter",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "management chair",
            "category": "furniture",
            "position_hint": "north side of the management desk facing the visitor zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 11,
            "label": "cash notes in exchange",
            "category": "prop",
            "position_hint": "temporarily held across the visitor side of the management desk; do not draw on the floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "active television news image",
            "category": "prop",
            "position_hint": "temporarily visible only within the television screen; do not draw on the floor plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "lifted telephone handset",
            "category": "prop",
            "position_hint": "temporarily held beside the telephone counter during the call; do not draw on the floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L13B01": {
        "bg_id": "L13B01",
        "fp_id": "fp_dance_hall_main",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          7,
          8,
          9,
          10,
          12,
          13,
          14,
          15
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "main dance hall",
            "category": "area",
            "position_hint": "overall rectangular room envelope",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "raised performance stage",
            "category": "area",
            "position_hint": "centered against the north wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "central dance floor",
            "category": "area",
            "position_hint": "large open area immediately south of the stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "perimeter circulation route",
            "category": "area",
            "position_hint": "continuous clear path around the dance floor and table banks",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "stage service door",
            "category": "opening",
            "position_hint": "northeast wall beside the raised stage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "west table bank",
            "category": "furniture",
            "position_hint": "along the west wall beside the dance floor",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "east table bank",
            "category": "furniture",
            "position_hint": "along the east wall beside the dance floor",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "southwest table bank",
            "category": "furniture",
            "position_hint": "southwest corner with a direct sightline to the stage",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "paired stage speakers",
            "category": "prop",
            "position_hint": "at the west and east front corners of the stage as one paired fixture group",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "stage lighting bar",
            "category": "prop",
            "position_hint": "spanning the front edge of the raised stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "dancing crowd and occupied tables",
            "category": "prop",
            "position_hint": "across the dance floor and around the perimeter table banks",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "active stage light pools",
            "category": "prop",
            "position_hint": "directed from the stage lighting bar across the stage and dance floor",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L14B01": {
        "bg_id": "L14B01",
        "fp_id": "fp_student_tavern_main",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared dining zone",
            "category": "area",
            "position_hint": "center and western half of the single-room interior",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "performance nook",
            "category": "area",
            "position_hint": "cleared northeast corner beside the shared dining zone",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "service zone",
            "category": "area",
            "position_hint": "narrow strip along the north wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "small southwest section immediately inside the entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "street entrance door",
            "category": "opening",
            "position_hint": "south wall near the southwest corner",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "street window pair",
            "category": "opening",
            "position_hint": "two adjacent window openings along the south wall east of the entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "gathering table",
            "category": "furniture",
            "position_hint": "center of the shared dining zone, oriented east to west",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "bench and stool seating",
            "category": "furniture",
            "position_hint": "arranged closely around the long sides and ends of the gathering table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "built-in service counter",
            "category": "furniture",
            "position_hint": "against the north wall within the service zone",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 10,
            "label": "dense cigarette smoke",
            "category": "prop",
            "position_hint": "hanging throughout the dining and performance zones",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "shared dishes and alcohol vessels",
            "category": "prop",
            "position_hint": "crowding the top of the gathering table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "acoustic guitar",
            "category": "prop",
            "position_hint": "held or placed beside the performer in the northeast performance nook",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L17B01": {
        "bg_id": "L17B01",
        "fp_id": "fp_beer_hall_main",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          14,
          15,
          16,
          17
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "audience seating zone",
            "category": "area",
            "position_hint": "large central portion of the hall between the entrance and stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "performance stage",
            "category": "area",
            "position_hint": "centered against the north wall at the far end of the hall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "service zone",
            "category": "area",
            "position_hint": "narrow strip along the east wall beside the audience zone",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "small vestibule-like area at the south end of the hall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "public entrance door",
            "category": "opening",
            "position_hint": "south wall opening into the entrance threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "corner audience table",
            "category": "furniture",
            "position_hint": "northwest corner of the audience zone with a clear view of the stage",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "central audience table bank",
            "category": "furniture",
            "position_hint": "middle of the audience zone, west of the main aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "side audience table bank",
            "category": "furniture",
            "position_hint": "along the west wall between the entrance and corner table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "service counter",
            "category": "furniture",
            "position_hint": "running lengthwise along the east side of the service zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "beer tap and sink station",
            "category": "prop",
            "position_hint": "built into the north half of the service counter",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "wired microphone stand",
            "category": "prop",
            "position_hint": "front-center of the performance stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "pin-light rail",
            "category": "prop",
            "position_hint": "aligned across the stage near its front edge",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "main circulation aisle",
            "category": "area",
            "position_hint": "clear route from the entrance threshold through the audience zone to the stage and service counter",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "singer performing on stage",
            "category": "prop",
            "position_hint": "at the front-center of the stage near the wired microphone; overlay only, not drawn on the floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "seated nighttime patrons",
            "category": "prop",
            "position_hint": "distributed around the corner, central, and side table groups while facing the stage; overlay only, not drawn on the floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "vivid pin-light illumination",
            "category": "area",
            "position_hint": "concentrated over the stage performer while the audience zone remains dim; overlay only, not drawn on the floor plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          14
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 14]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L18B01": {
        "bg_id": "L18B01",
        "fp_id": "fp_instrument_shop_main",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "retail sales area",
            "category": "area",
            "position_hint": "front and middle portion of the shop",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "repair service area",
            "category": "area",
            "position_hint": "rear portion behind the sales counter",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "south center at the storefront entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "glazed entrance door",
            "category": "opening",
            "position_hint": "south wall, centered on the entrance threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "storefront display window",
            "category": "opening",
            "position_hint": "south wall, beside the entrance door",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "sales counter",
            "category": "furniture",
            "position_hint": "across the middle of the shop at the front edge of the repair area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "west wall guitar display",
            "category": "prop",
            "position_hint": "west wall of the retail sales area",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "east wall guitar display",
            "category": "prop",
            "position_hint": "east wall of the retail sales area",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "guitar repair workbench",
            "category": "furniture",
            "position_hint": "against the north rear wall of the repair service area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "customer chair",
            "category": "furniture",
            "position_hint": "beside the repair workbench with access to the retail aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 11,
            "label": "guitar case on counter",
            "category": "prop",
            "position_hint": "temporarily laid across the sales counter",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "damaged guitar and detached neck",
            "category": "prop",
            "position_hint": "initially on the sales counter, then moved to the repair workbench",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "paper songbook",
            "category": "prop",
            "position_hint": "temporarily on the floor beside the counter or held near the customer chair",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "adhesive on broken neck joint",
            "category": "prop",
            "position_hint": "on the damaged guitar at the repair workbench during repair",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L23B01": {
        "bg_id": "L23B01",
        "fp_id": "fp_gwangseok_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "private bedroom area",
            "category": "area",
            "position_hint": "main central room area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "narrow strip inside the east-side entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "bedroom door",
            "category": "opening",
            "position_hint": "east wall beside the entrance threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "exterior window",
            "category": "opening",
            "position_hint": "west wall adjacent to the desk",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "floor bedding",
            "category": "furniture",
            "position_hint": "north half of the private bedroom area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "writing desk",
            "category": "furniture",
            "position_hint": "against the west wall below or immediately beside the window",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "framed family photo display",
            "category": "prop",
            "position_hint": "on the window-facing side of the writing desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "window curtain",
            "category": "prop",
            "position_hint": "along the interior side of the west-wall window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 9,
            "label": "scattered glass bottles",
            "category": "prop",
            "position_hint": "loose groups around the bedding and central floor",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "scattered snack wrappers",
            "category": "prop",
            "position_hint": "irregularly scattered across the central floor",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "fallen acoustic guitar",
            "category": "prop",
            "position_hint": "on the floor in the southeast corner near the desk side of the room",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "afternoon sunlight path",
            "category": "prop",
            "position_hint": "extending from the west-wall window across the desk and framed photograph",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L21B01": {
        "bg_id": "L21B01",
        "fp_id": "fp_house_yard_maru",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "compact yard",
            "category": "area",
            "position_hint": "central exterior area between the gate and raised platform",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "yard gate",
            "category": "opening",
            "position_hint": "south boundary of the compact yard, opening inward",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "raised floor platform",
            "category": "area",
            "position_hint": "north side of the yard, running along the house frontage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "room threshold",
            "category": "area",
            "position_hint": "north edge of the raised platform directly before the private room doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "private room",
            "category": "area",
            "position_hint": "north of the raised platform behind the room threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "sliding room door",
            "category": "opening",
            "position_hint": "courtyard-facing wall between the raised platform and private room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "room window",
            "category": "opening",
            "position_hint": "courtyard-facing wall beside the sliding room door",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "rainwater drainage groove",
            "category": "prop",
            "position_hint": "along the east edge of the yard, leading toward the gate side",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 9,
            "label": "metal wash basin",
            "category": "prop",
            "position_hint": "temporarily placed on the yard approach path between the gate and raised platform",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L24B01": {
        "bg_id": "L24B01",
        "fp_id": "fp_l24_corridor",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared corridor zone",
            "category": "area",
            "position_hint": "long east-west strip occupying the center of the plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "target club-room interior edge",
            "category": "area",
            "position_hint": "shallow visible portion beyond the north wall of the corridor",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "target room threshold zone",
            "category": "area",
            "position_hint": "narrow strip across the target doorway on the north side of the corridor",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "target club-room doorway",
            "category": "opening",
            "position_hint": "north corridor wall near the center, with an inward door swing",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "Room 207 number plaque",
            "category": "prop",
            "position_hint": "corridor-facing wall immediately beside and above the target doorway position",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "west neighboring club-room door",
            "category": "opening",
            "position_hint": "north corridor wall, west of the target doorway",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "east neighboring club-room door",
            "category": "opening",
            "position_hint": "north corridor wall, east of the target doorway",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "opposite club-room door",
            "category": "opening",
            "position_hint": "south corridor wall, offset from the target doorway",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "corridor end window",
            "category": "opening",
            "position_hint": "east end wall of the corridor",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L25B01": {
        "bg_id": "L25B01",
        "fp_id": "fp_l25_room_207",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared seminar zone",
            "category": "area",
            "position_hint": "central and largest portion of the room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "presentation zone",
            "category": "area",
            "position_hint": "narrow zone along the east wall in front of the chalkboard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance threshold zone",
            "category": "area",
            "position_hint": "southwest corner immediately inside the corridor entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "corridor entrance door",
            "category": "opening",
            "position_hint": "south wall near the southwest corner, swinging inward toward the threshold zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "exterior window bank",
            "category": "opening",
            "position_hint": "centered along the north wall opposite the entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "large seminar table",
            "category": "furniture",
            "position_hint": "center of the shared seminar zone, long axis running east to west",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "seven seminar chairs",
            "category": "furniture",
            "position_hint": "distributed around all four sides of the large seminar table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "wall-mounted chalkboard",
            "category": "prop",
            "position_hint": "center of the east wall facing the seminar table",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 9,
            "label": "chalk slogan on board",
            "category": "prop",
            "position_hint": "written across the surface of the east-wall chalkboard during the seminar",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "seminar paper handouts",
            "category": "prop",
            "position_hint": "spread across the large seminar table during the daytime meeting",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L28B02": {
        "bg_id": "L28B02",
        "fp_id": "fp_l28_cafe_interior",
        "use_numbered_elements": [
          1,
          3,
          4,
          5,
          6,
          7,
          8,
          10,
          11,
          12,
          13,
          14
        ],
        "ignore_numbered_elements": [
          15,
          16,
          17,
          18,
          19,
          20
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "audience seating area",
            "category": "area",
            "position_hint": "center and south-west portion of the cafe",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "south-east corner between the stair and seating area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "television corner",
            "category": "area",
            "position_hint": "north-west corner beside the shared seating area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south-east wall at the bottom of the descending stair",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "descending entrance stair",
            "category": "area",
            "position_hint": "east edge leading down from street level to the threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "CRT television",
            "category": "prop",
            "position_hint": "against the north-west wall, angled toward the central tables",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "central table and chair set",
            "category": "furniture",
            "position_hint": "center of the audience seating area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "west side table and chair set",
            "category": "furniture",
            "position_hint": "west side of the audience seating area below the television corner",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "rear table and chair set",
            "category": "furniture",
            "position_hint": "south-central portion of the audience seating area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "fixed stage light",
            "category": "prop",
            "position_hint": "over the front edge of the stage, directed toward its center",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "manual pin spotlight",
            "category": "prop",
            "position_hint": "east side of the audience area, aimed toward the front table and stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "loose acoustic guitars",
            "category": "prop",
            "position_hint": "around the central gathering table during the daytime music session",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "reserved table sign",
            "category": "prop",
            "position_hint": "on the front table nearest the stage during the night showcase",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "liquor bottles and glasses",
            "category": "prop",
            "position_hint": "crowding the central table during the lively daytime reunion",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "single drinking setting",
            "category": "prop",
            "position_hint": "on the central table during the subdued daytime confrontation",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "audience spotlight pool",
            "category": "prop",
            "position_hint": "centered on the front table during the night performance",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "active stage illumination",
            "category": "prop",
            "position_hint": "covering the performer position at the center of the small stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "darkened entrance state",
            "category": "prop",
            "position_hint": "around the entrance door and threshold during the nighttime arrival",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          3,
          4,
          6
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3, 4, 6]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L28B04": {
        "bg_id": "L28B04",
        "fp_id": "fp_l28_cafe_interior",
        "use_numbered_elements": [
          1,
          2,
          3,
          5,
          6,
          9,
          12,
          13,
          20
        ],
        "ignore_numbered_elements": [
          14,
          15,
          16,
          17,
          18,
          19
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "audience seating area",
            "category": "area",
            "position_hint": "center and south-west portion of the cafe",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "small performance stage",
            "category": "area",
            "position_hint": "along the north wall, facing south toward the tables",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "south-east corner between the stair and seating area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south-east wall at the bottom of the descending stair",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "descending entrance stair",
            "category": "area",
            "position_hint": "east edge leading down from street level to the threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "front table and chair set",
            "category": "furniture",
            "position_hint": "directly south of the stage with a clear view of performers",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "fixed stage light",
            "category": "prop",
            "position_hint": "over the front edge of the stage, directed toward its center",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "manual pin spotlight",
            "category": "prop",
            "position_hint": "east side of the audience area, aimed toward the front table and stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 20,
            "label": "darkened entrance state",
            "category": "prop",
            "position_hint": "around the entrance door and threshold during the nighttime arrival",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 14,
            "label": "loose acoustic guitars",
            "category": "prop",
            "position_hint": "around the central gathering table during the daytime music session",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "reserved table sign",
            "category": "prop",
            "position_hint": "on the front table nearest the stage during the night showcase",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "liquor bottles and glasses",
            "category": "prop",
            "position_hint": "crowding the central table during the lively daytime reunion",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "single drinking setting",
            "category": "prop",
            "position_hint": "on the central table during the subdued daytime confrontation",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "audience spotlight pool",
            "category": "prop",
            "position_hint": "centered on the front table during the night performance",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "active stage illumination",
            "category": "prop",
            "position_hint": "covering the performer position at the center of the small stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          6
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 6]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L28B05": {
        "bg_id": "L28B05",
        "fp_id": "fp_l28_cafe_interior",
        "use_numbered_elements": [
          1,
          2,
          4,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          15,
          18,
          19
        ],
        "ignore_numbered_elements": [
          14,
          16,
          17,
          20
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "audience seating area",
            "category": "area",
            "position_hint": "center and south-west portion of the cafe",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "small performance stage",
            "category": "area",
            "position_hint": "along the north wall, facing south toward the tables",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "television corner",
            "category": "area",
            "position_hint": "north-west corner beside the shared seating area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "CRT television",
            "category": "prop",
            "position_hint": "against the north-west wall, angled toward the central tables",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "central table and chair set",
            "category": "furniture",
            "position_hint": "center of the audience seating area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "front table and chair set",
            "category": "furniture",
            "position_hint": "directly south of the stage with a clear view of performers",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "west side table and chair set",
            "category": "furniture",
            "position_hint": "west side of the audience seating area below the television corner",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "rear table and chair set",
            "category": "furniture",
            "position_hint": "south-central portion of the audience seating area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "fixed stage light",
            "category": "prop",
            "position_hint": "over the front edge of the stage, directed toward its center",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "manual pin spotlight",
            "category": "prop",
            "position_hint": "east side of the audience area, aimed toward the front table and stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "reserved table sign",
            "category": "prop",
            "position_hint": "on the front table nearest the stage during the night showcase",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "audience spotlight pool",
            "category": "prop",
            "position_hint": "centered on the front table during the night performance",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "active stage illumination",
            "category": "prop",
            "position_hint": "covering the performer position at the center of the small stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 14,
            "label": "loose acoustic guitars",
            "category": "prop",
            "position_hint": "around the central gathering table during the daytime music session",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "liquor bottles and glasses",
            "category": "prop",
            "position_hint": "crowding the central table during the lively daytime reunion",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "single drinking setting",
            "category": "prop",
            "position_hint": "on the central table during the subdued daytime confrontation",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "darkened entrance state",
            "category": "prop",
            "position_hint": "around the entrance door and threshold during the nighttime arrival",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L28B03": {
        "bg_id": "L28B03",
        "fp_id": "fp_l28_cafe_interior",
        "use_numbered_elements": [
          1,
          2,
          3,
          5,
          6,
          8,
          12,
          13,
          17
        ],
        "ignore_numbered_elements": [
          14,
          15,
          16,
          18,
          19,
          20
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "audience seating area",
            "category": "area",
            "position_hint": "center and south-west portion of the cafe",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "small performance stage",
            "category": "area",
            "position_hint": "along the north wall, facing south toward the tables",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "south-east corner between the stair and seating area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south-east wall at the bottom of the descending stair",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "descending entrance stair",
            "category": "area",
            "position_hint": "east edge leading down from street level to the threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "central table and chair set",
            "category": "furniture",
            "position_hint": "center of the audience seating area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "fixed stage light",
            "category": "prop",
            "position_hint": "over the front edge of the stage, directed toward its center",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "manual pin spotlight",
            "category": "prop",
            "position_hint": "east side of the audience area, aimed toward the front table and stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 17,
            "label": "single drinking setting",
            "category": "prop",
            "position_hint": "on the central table during the subdued daytime confrontation",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 14,
            "label": "loose acoustic guitars",
            "category": "prop",
            "position_hint": "around the central gathering table during the daytime music session",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "reserved table sign",
            "category": "prop",
            "position_hint": "on the front table nearest the stage during the night showcase",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "liquor bottles and glasses",
            "category": "prop",
            "position_hint": "crowding the central table during the lively daytime reunion",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "audience spotlight pool",
            "category": "prop",
            "position_hint": "centered on the front table during the night performance",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "active stage illumination",
            "category": "prop",
            "position_hint": "covering the performer position at the center of the small stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "darkened entrance state",
            "category": "prop",
            "position_hint": "around the entrance door and threshold during the nighttime arrival",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          6
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 6]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L28B01": {
        "bg_id": "L28B01",
        "fp_id": "fp_l28_cafe_interior",
        "use_numbered_elements": [
          1,
          3,
          5,
          6,
          8,
          10,
          11,
          16
        ],
        "ignore_numbered_elements": [
          14,
          15,
          17,
          18,
          19,
          20
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "audience seating area",
            "category": "area",
            "position_hint": "center and south-west portion of the cafe",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "south-east corner between the stair and seating area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south-east wall at the bottom of the descending stair",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "descending entrance stair",
            "category": "area",
            "position_hint": "east edge leading down from street level to the threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "central table and chair set",
            "category": "furniture",
            "position_hint": "center of the audience seating area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "west side table and chair set",
            "category": "furniture",
            "position_hint": "west side of the audience seating area below the television corner",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "rear table and chair set",
            "category": "furniture",
            "position_hint": "south-central portion of the audience seating area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 16,
            "label": "liquor bottles and glasses",
            "category": "prop",
            "position_hint": "crowding the central table during the lively daytime reunion",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 14,
            "label": "loose acoustic guitars",
            "category": "prop",
            "position_hint": "around the central gathering table during the daytime music session",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "reserved table sign",
            "category": "prop",
            "position_hint": "on the front table nearest the stage during the night showcase",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "single drinking setting",
            "category": "prop",
            "position_hint": "on the central table during the subdued daytime confrontation",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "audience spotlight pool",
            "category": "prop",
            "position_hint": "centered on the front table during the night performance",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "active stage illumination",
            "category": "prop",
            "position_hint": "covering the performer position at the center of the small stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "darkened entrance state",
            "category": "prop",
            "position_hint": "around the entrance door and threshold during the nighttime arrival",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          3,
          6
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3, 6]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L29B01": {
        "bg_id": "L29B01",
        "fp_id": "fp_l29_basement_entrance",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "street apron",
            "category": "area",
            "position_hint": "outside the upper entrance along the street edge",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "recessed threshold",
            "category": "area",
            "position_hint": "between the street apron and the head of the stairs",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "descending stair flight",
            "category": "area",
            "position_hint": "center of the narrow entrance footprint, descending from street grade",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "poster wall",
            "category": "area",
            "position_hint": "side wall beside the recessed threshold and upper stairs",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "lower basement entry opening",
            "category": "opening",
            "position_hint": "at the foot of the descending stair flight",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "stair handrail",
            "category": "prop",
            "position_hint": "fixed along one side of the descending stair flight",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 7,
            "label": "handmade event poster",
            "category": "prop",
            "position_hint": "temporarily attached to the poster wall near the upper entrance",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L30B01": {
        "bg_id": "L30B01",
        "fp_id": "fp_cathedral_nave",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          15,
          16
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "central nave",
            "category": "area",
            "position_hint": "long central shared zone extending from the west entrance to the eastern stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "raised stage zone",
            "category": "area",
            "position_hint": "east end of the nave, centered on the main longitudinal axis",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "north side aisle",
            "category": "area",
            "position_hint": "along the north side of the nave beside the pews",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "south side aisle",
            "category": "area",
            "position_hint": "along the south side of the nave beside the pews",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "fixed pew banks",
            "category": "furniture",
            "position_hint": "paired rectangular banks filling most of the nave, separated by a broad central aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "main entrance doors",
            "category": "opening",
            "position_hint": "center of the west wall, aligned with the central aisle and stage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "stained-glass window",
            "category": "opening",
            "position_hint": "south wall near the eastern half of the nave, oriented toward the stage sightline",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "stage access steps",
            "category": "furniture",
            "position_hint": "center front edge of the raised eastern stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 9,
            "label": "stage projection screen",
            "category": "prop",
            "position_hint": "rear center of the raised stage behind the performers",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "performance keyboard",
            "category": "prop",
            "position_hint": "one side of the stage near the screen",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "performance guitar",
            "category": "prop",
            "position_hint": "stage area beside the lead performer",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "full seated audience",
            "category": "prop",
            "position_hint": "occupying the pew banks throughout the central nave",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "plainclothes police group",
            "category": "prop",
            "position_hint": "embedded within a side portion of the audience seating near the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "stained-glass light path",
            "category": "prop",
            "position_hint": "extending from the south stained-glass window toward a performer near the stage edge",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "stage performers",
            "category": "prop",
            "position_hint": "distributed across the raised eastern stage in front of the screen",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "projected historical slides",
            "category": "prop",
            "position_hint": "contained entirely within the flat surface of the stage screen",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L31B01": {
        "bg_id": "L31B01",
        "fp_id": "fp_l31_passenger_compartment",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          8,
          9,
          10,
          11,
          12
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "passenger compartment segment",
            "category": "area",
            "position_hint": "entire elongated carriage interior enclosed by the side walls and end bulkheads",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "facing four-seat bay",
            "category": "area",
            "position_hint": "north side of the compartment beside the bay-side window",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "central aisle",
            "category": "area",
            "position_hint": "long circulation strip running east-west along the south side of the seat bay",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "west two-seat bench",
            "category": "furniture",
            "position_hint": "west end of the four-seat bay, transverse to the carriage and facing east",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "east two-seat bench",
            "category": "furniture",
            "position_hint": "east end of the four-seat bay, transverse to the carriage and facing west",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "bay-side window",
            "category": "opening",
            "position_hint": "north exterior wall centered beside the facing seat bay",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "end passage opening",
            "category": "opening",
            "position_hint": "east bulkhead aligned with the central aisle",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "overhead luggage rack",
            "category": "furniture",
            "position_hint": "narrow fixed rack projected along the north wall above the facing seat bay",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 10,
            "label": "four seated travelers",
            "category": "prop",
            "position_hint": "distributed across the four seating positions of the facing bay; overlay only and not drawn on the plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "open poetry book",
            "category": "prop",
            "position_hint": "held by one traveler on a seat in the facing bay; overlay only and not drawn on the plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "sunlit field view",
            "category": "prop",
            "position_hint": "visible beyond the bay-side window during daytime travel; overlay only and not drawn on the plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L54B01": {
        "bg_id": "L54B01",
        "fp_id": "fp_l54_intercar_entry",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "narrow inter-car vestibule",
            "category": "area",
            "position_hint": "center of plan between the two longitudinal carriage thresholds",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "recessed step well",
            "category": "area",
            "position_hint": "east side of vestibule immediately inside the exterior doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "hinged side doorway",
            "category": "opening",
            "position_hint": "east exterior wall beside the step well",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "door window",
            "category": "opening",
            "position_hint": "within the east side doorway leaf",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "first carriage threshold",
            "category": "opening",
            "position_hint": "north end of the vestibule leading into one carriage section",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "adjacent gangway threshold",
            "category": "opening",
            "position_hint": "south end of the vestibule leading toward the adjoining carriage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "fixed step handrail",
            "category": "prop",
            "position_hint": "along the interior side of the recessed step well",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 8,
            "label": "loose bottle",
            "category": "prop",
            "position_hint": "temporarily placed near the seated position on the step well; do not draw on the base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "open notebook",
            "category": "prop",
            "position_hint": "temporarily held or placed near the step well; do not draw on the base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L33B02": {
        "bg_id": "L33B02",
        "fp_id": "fp_l33_gate_alley",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          7,
          9,
          10,
          11,
          12,
          13,
          15,
          16
        ],
        "ignore_numbered_elements": [
          14
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "street approach",
            "category": "area",
            "position_hint": "south side of plan, running east-west outside the property wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "high perimeter wall",
            "category": "area",
            "position_hint": "along the south property boundary, separating the alley from the courtyard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "motorized front gate",
            "category": "opening",
            "position_hint": "wide opening near the center of the south perimeter wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "threshold apron",
            "category": "area",
            "position_hint": "immediately inside number 3, spanning the transition from alley to courtyard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "two-storey house footprint",
            "category": "area",
            "position_hint": "north side of plan, set well back from the street wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "front window bay",
            "category": "opening",
            "position_hint": "south-facing wall of number 7 beside the principal entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "second-floor terrace projection",
            "category": "area",
            "position_hint": "center of the south-facing house frontage, projecting over the courtyard side",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "terrace access opening",
            "category": "opening",
            "position_hint": "north edge of number 10 against the upper house frontage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "west streetlamp",
            "category": "prop",
            "position_hint": "southwest alley edge outside the perimeter wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "east streetlamp",
            "category": "prop",
            "position_hint": "southeast alley edge outside the perimeter wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "night streetlamp glow",
            "category": "prop",
            "position_hint": "localized around numbers 12 and 13 and across the alley-facing gate",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "gentle wind movement",
            "category": "prop",
            "position_hint": "across the street-facing threshold and upper terrace frontage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 14,
            "label": "open gate state",
            "category": "opening",
            "position_hint": "at number 3, with the gate retracted or swung clear for daytime entry",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          4,
          7,
          10
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 4, 7, 10]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L33B01": {
        "bg_id": "L33B01",
        "fp_id": "fp_l33_gate_alley",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14
        ],
        "ignore_numbered_elements": [
          15,
          16
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "street approach",
            "category": "area",
            "position_hint": "south side of plan, running east-west outside the property wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "high perimeter wall",
            "category": "area",
            "position_hint": "along the south property boundary, separating the alley from the courtyard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "motorized front gate",
            "category": "opening",
            "position_hint": "wide opening near the center of the south perimeter wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "threshold apron",
            "category": "area",
            "position_hint": "immediately inside number 3, spanning the transition from alley to courtyard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "lawn courtyard",
            "category": "area",
            "position_hint": "broad central area between the perimeter wall and house frontage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "front approach path",
            "category": "area",
            "position_hint": "centered route crossing the lawn from number 4 to number 8",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "two-storey house footprint",
            "category": "area",
            "position_hint": "north side of plan, set well back from the street wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "principal house entrance",
            "category": "opening",
            "position_hint": "south-facing wall of number 7, aligned with number 6",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "front window bay",
            "category": "opening",
            "position_hint": "south-facing wall of number 7 beside the principal entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "second-floor terrace projection",
            "category": "area",
            "position_hint": "center of the south-facing house frontage, projecting over the courtyard side",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "terrace access opening",
            "category": "opening",
            "position_hint": "north edge of number 10 against the upper house frontage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "west streetlamp",
            "category": "prop",
            "position_hint": "southwest alley edge outside the perimeter wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "east streetlamp",
            "category": "prop",
            "position_hint": "southeast alley edge outside the perimeter wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "open gate state",
            "category": "opening",
            "position_hint": "at number 3, with the gate retracted or swung clear for daytime entry",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "night streetlamp glow",
            "category": "prop",
            "position_hint": "localized around numbers 12 and 13 and across the alley-facing gate",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "gentle wind movement",
            "category": "prop",
            "position_hint": "across the street-facing threshold and upper terrace frontage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          4,
          5,
          6,
          7,
          10
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 4, 5, 6, 7, 10]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L35B01": {
        "bg_id": "L35B01",
        "fp_id": "fp_l35_yard",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "broad lawn yard",
            "category": "area",
            "position_hint": "central shared exterior zone between the gate and house",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "gate approach court",
            "category": "area",
            "position_hint": "south-center threshold zone immediately inside the street gate",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "house footprint and facade",
            "category": "area",
            "position_hint": "north side of the lot facing south across the lawn",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "second-floor front terrace",
            "category": "area",
            "position_hint": "projecting from the south face of the house above the yard-facing facade",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "high perimeter wall",
            "category": "area",
            "position_hint": "around the west, south, and east boundaries of the enclosed yard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "motorized sliding gate",
            "category": "opening",
            "position_hint": "south boundary opening aligned with the gate approach court",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "gate motor housing",
            "category": "prop",
            "position_hint": "beside the sliding gate track on the inner south boundary",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "front walkway",
            "category": "area",
            "position_hint": "running from the gate approach across the lawn to the front entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "front entrance door",
            "category": "opening",
            "position_hint": "ground-floor south facade at the end of the front walkway",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "ground-floor window bank",
            "category": "opening",
            "position_hint": "yard-facing ground-floor facade beside the front entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "terrace access door",
            "category": "opening",
            "position_hint": "second-floor south facade opening directly onto the terrace",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "upper facade window bank",
            "category": "opening",
            "position_hint": "second-floor yard-facing facade adjacent to the terrace access door",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "terrace railing",
            "category": "prop",
            "position_hint": "along the exposed south edge of the second-floor terrace",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5, 8]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L37B01": {
        "bg_id": "L37B01",
        "fp_id": "fp_l37_youngsook_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "private sleeping zone",
            "category": "area",
            "position_hint": "east half of the bedroom around the bed",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "music and study zone",
            "category": "area",
            "position_hint": "north and west portions of the bedroom around the piano and desk",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "threshold and circulation zone",
            "category": "area",
            "position_hint": "southwest entry area continuing through the open center of the room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "bedroom entry door",
            "category": "opening",
            "position_hint": "south wall near the southwest corner, swinging inward",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "broad bedroom window",
            "category": "opening",
            "position_hint": "west wall above and beside the desk",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "upright piano",
            "category": "furniture",
            "position_hint": "centered against the north wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "piano bench",
            "category": "furniture",
            "position_hint": "directly south of the upright piano",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "neat single bed",
            "category": "furniture",
            "position_hint": "lengthwise along the east wall with head toward the north",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "bookshelf",
            "category": "furniture",
            "position_hint": "southeast wall near the foot of the bed",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "writing desk",
            "category": "furniture",
            "position_hint": "west wall near the window, south of the piano zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "desk chair",
            "category": "furniture",
            "position_hint": "immediately east of the writing desk",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "lesson guitar",
            "category": "prop",
            "position_hint": "held or resting beside the piano bench during the daytime lesson",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "fruit plate",
            "category": "prop",
            "position_hint": "on top of the writing desk during the daytime lesson",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L39B01": {
        "bg_id": "L39B01",
        "fp_id": "fp_l39_living_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          15
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "living room shared zone",
            "category": "area",
            "position_hint": "center and west side of plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entry vestibule",
            "category": "area",
            "position_hint": "southeast corner adjoining main entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "kitchen access zone",
            "category": "area",
            "position_hint": "northeast side beyond kitchen doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "stair circulation zone",
            "category": "area",
            "position_hint": "east side between entry and kitchen access",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "main entrance door",
            "category": "opening",
            "position_hint": "south wall of entry vestibule",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "kitchen doorway",
            "category": "opening",
            "position_hint": "northeast wall of living room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "stair opening",
            "category": "opening",
            "position_hint": "east edge of living room beside entry circulation",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "broad window bank",
            "category": "opening",
            "position_hint": "west exterior wall of living room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "entry-side projection wall",
            "category": "area",
            "position_hint": "south wall beside the main entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "sofa set",
            "category": "furniture",
            "position_hint": "northwest side of living room facing projection wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "low coffee table",
            "category": "furniture",
            "position_hint": "center of living room in front of sofa set",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "built-in kitchen counter",
            "category": "furniture",
            "position_hint": "inside kitchen access zone along north wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 13,
            "label": "analog slide projector",
            "category": "prop",
            "position_hint": "temporarily placed in living room facing projection wall; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "projected slide image and harsh beam",
            "category": "prop",
            "position_hint": "temporary projection across living room onto entry-side wall; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "scissors from kitchen",
            "category": "prop",
            "position_hint": "temporarily carried from kitchen into confrontation area; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          9
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 9]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L41B01": {
        "bg_id": "L41B01",
        "fp_id": "fp_l41_recording_booth",
        "use_numbered_elements": [
          1,
          2,
          4,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          15
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "recording booth area",
            "category": "area",
            "position_hint": "large rectangular room occupying the east and central portion of the plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "control room area",
            "category": "area",
            "position_hint": "rectangular room along the north side of the recording booth",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "booth swing door",
            "category": "opening",
            "position_hint": "west wall of the recording booth, opening from the sound-lock vestibule",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "observation window",
            "category": "opening",
            "position_hint": "shared north wall of the recording booth, centered toward the control room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "ensemble microphone stand left",
            "category": "prop",
            "position_hint": "northwest portion of the booth, facing the observation window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "ensemble microphone stand center",
            "category": "prop",
            "position_hint": "central portion of the booth, facing the observation window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "effect microphone stand",
            "category": "prop",
            "position_hint": "east side of the booth, offset from the ensemble microphones",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "analog mixing console",
            "category": "furniture",
            "position_hint": "inside the control room, parallel to and facing the observation window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "control room chair",
            "category": "furniture",
            "position_hint": "between the analog mixing console and the north side of the control room",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "acoustic wall panels",
            "category": "prop",
            "position_hint": "fixed rectangular panel groups along the east, south, and west booth walls",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 13,
            "label": "vocal ensemble performers",
            "category": "prop",
            "position_hint": "grouped inside the booth around microphone stands 7 and 8",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "paper sheet music",
            "category": "prop",
            "position_hint": "held by the performers around microphone stands 7 and 8",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "recording supervisor with raised paper cup",
            "category": "prop",
            "position_hint": "at the control room chair behind the observation window, interacting with the performers",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L46B01": {
        "bg_id": "L46B01",
        "fp_id": "fp_l46_basement_stairs",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          12
        ],
        "ignore_numbered_elements": [
          11
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "alley street threshold",
            "category": "area",
            "position_hint": "north edge of plan, outside the building line",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "upper approach",
            "category": "area",
            "position_hint": "between the alley threshold and the top stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "exterior stair flight",
            "category": "area",
            "position_hint": "narrow central flight descending from north to south",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "lower landing",
            "category": "area",
            "position_hint": "south end of stair flight directly before the office door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "office entrance door",
            "category": "opening",
            "position_hint": "south wall of lower landing, opening inward into the office",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "semi-basement window",
            "category": "opening",
            "position_hint": "street-facing building wall adjacent to the upper side of the stairwell",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "metal stair handrail",
            "category": "prop",
            "position_hint": "along one long side of the exterior stair flight and landing",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "landing drain",
            "category": "prop",
            "position_hint": "floor of lower landing near the outer corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "stairwell retaining enclosure",
            "category": "area",
            "position_hint": "parallel walls enclosing both sides of the descending stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 10,
            "label": "desk being carried",
            "category": "furniture",
            "position_hint": "across the exterior stair flight during the daytime move",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "moving truck",
            "category": "prop",
            "position_hint": "at the alley edge beside the upper approach during the daytime move",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 11,
            "label": "cassette recorder before door",
            "category": "prop",
            "position_hint": "center of lower landing immediately outside the closed office door at night",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          9
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 9]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L46B02": {
        "bg_id": "L46B02",
        "fp_id": "fp_l46_basement_stairs",
        "use_numbered_elements": [
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          11
        ],
        "ignore_numbered_elements": [
          10,
          12
        ],
        "base_markers_to_reference": [
          {
            "number": 3,
            "label": "exterior stair flight",
            "category": "area",
            "position_hint": "narrow central flight descending from north to south",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "lower landing",
            "category": "area",
            "position_hint": "south end of stair flight directly before the office door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "office entrance door",
            "category": "opening",
            "position_hint": "south wall of lower landing, opening inward into the office",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "semi-basement window",
            "category": "opening",
            "position_hint": "street-facing building wall adjacent to the upper side of the stairwell",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "metal stair handrail",
            "category": "prop",
            "position_hint": "along one long side of the exterior stair flight and landing",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "landing drain",
            "category": "prop",
            "position_hint": "floor of lower landing near the outer corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "stairwell retaining enclosure",
            "category": "area",
            "position_hint": "parallel walls enclosing both sides of the descending stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 11,
            "label": "cassette recorder before door",
            "category": "prop",
            "position_hint": "center of lower landing immediately outside the closed office door at night",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 10,
            "label": "desk being carried",
            "category": "furniture",
            "position_hint": "across the exterior stair flight during the daytime move",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "moving truck",
            "category": "prop",
            "position_hint": "at the alley edge beside the upper approach during the daytime move",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          3,
          4,
          9
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([3, 4, 9]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L47B01": {
        "bg_id": "L47B01",
        "fp_id": "fp_l47_flood_response_site",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "alley response zone",
            "category": "area",
            "position_hint": "south and west of the building facade, forming the primary exterior circulation area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "four-storey building footprint",
            "category": "area",
            "position_hint": "north side of the narrow alley, aligned tightly with the alley edge",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "semi-basement office frontage",
            "category": "area",
            "position_hint": "inside the building footprint directly behind the alley-facing lower facade",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "exterior basement stair and areaway",
            "category": "area",
            "position_hint": "recessed along the alley-facing facade, descending beside the semi-basement office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "semi-basement entrance door",
            "category": "opening",
            "position_hint": "at the bottom of number 4, opening into number 3",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "low semi-basement window",
            "category": "opening",
            "position_hint": "alley-facing lower facade beside number 4",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 7,
            "label": "broken window glazing",
            "category": "opening",
            "position_hint": "applied only to number 6 during the flood-response state",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "floodwater discharge",
            "category": "prop",
            "position_hint": "at number 6 and across the adjacent edge of number 1 during the response",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "drainage pump and hoses",
            "category": "prop",
            "position_hint": "temporarily arranged in number 1 beside number 6",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "ambulance",
            "category": "prop",
            "position_hint": "temporarily parked lengthwise in number 1, facing along the alley near the building",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L48B01": {
        "bg_id": "L48B01",
        "fp_id": "fp_l48_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          15,
          16
        ],
        "ignore_numbered_elements": [
          17,
          18,
          19
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared work zone",
            "category": "area",
            "position_hint": "west and central portion of the open office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "rehearsal zone",
            "category": "area",
            "position_hint": "open center-east floor beside the upright piano",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "conversation zone",
            "category": "area",
            "position_hint": "south-east portion of the office around the sofa",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "storage and equipment zone",
            "category": "area",
            "position_hint": "north-west edge of the office beside wall shelving",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "sunken entry threshold",
            "category": "area",
            "position_hint": "south-west corner at the bottom of the exterior stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south-west wall connecting the recessed threshold to the office",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "high semi-basement window",
            "category": "opening",
            "position_hint": "north exterior wall above floor level",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "first office desk",
            "category": "furniture",
            "position_hint": "west-center of the shared work zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "second office desk",
            "category": "furniture",
            "position_hint": "adjacent to number 8 in the shared work zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "office chair set",
            "category": "furniture",
            "position_hint": "arranged around numbers 8 and 9",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "wall shelving bank",
            "category": "furniture",
            "position_hint": "north-west wall within the storage zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "upright piano",
            "category": "furniture",
            "position_hint": "north-east wall facing the rehearsal zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "analog audio console",
            "category": "furniture",
            "position_hint": "east wall between the piano and conversation zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "sofa",
            "category": "furniture",
            "position_hint": "south-east wall, oriented toward the entrance sightline",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "low table",
            "category": "furniture",
            "position_hint": "directly in front of number 14 in the conversation zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 16,
            "label": "newspaper meal spread",
            "category": "prop",
            "position_hint": "temporarily spread across the office desks during early occupancy",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 17,
            "label": "egg-carton acoustic treatment",
            "category": "prop",
            "position_hint": "temporarily covering broad sections of the rehearsal-zone perimeter walls",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "portable cassette recorder",
            "category": "prop",
            "position_hint": "carried through or placed near the entrance during the intimate nighttime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "stacked cassette tape boxes",
            "category": "prop",
            "position_hint": "temporarily stacked in the north-west storage zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L48B02": {
        "bg_id": "L48B02",
        "fp_id": "fp_l48_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          15,
          17
        ],
        "ignore_numbered_elements": [
          16,
          18,
          19
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared work zone",
            "category": "area",
            "position_hint": "west and central portion of the open office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "rehearsal zone",
            "category": "area",
            "position_hint": "open center-east floor beside the upright piano",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "conversation zone",
            "category": "area",
            "position_hint": "south-east portion of the office around the sofa",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "storage and equipment zone",
            "category": "area",
            "position_hint": "north-west edge of the office beside wall shelving",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "sunken entry threshold",
            "category": "area",
            "position_hint": "south-west corner at the bottom of the exterior stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south-west wall connecting the recessed threshold to the office",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "high semi-basement window",
            "category": "opening",
            "position_hint": "north exterior wall above floor level",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "first office desk",
            "category": "furniture",
            "position_hint": "west-center of the shared work zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "second office desk",
            "category": "furniture",
            "position_hint": "adjacent to number 8 in the shared work zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "office chair set",
            "category": "furniture",
            "position_hint": "arranged around numbers 8 and 9",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "wall shelving bank",
            "category": "furniture",
            "position_hint": "north-west wall within the storage zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "upright piano",
            "category": "furniture",
            "position_hint": "north-east wall facing the rehearsal zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "analog audio console",
            "category": "furniture",
            "position_hint": "east wall between the piano and conversation zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "sofa",
            "category": "furniture",
            "position_hint": "south-east wall, oriented toward the entrance sightline",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "low table",
            "category": "furniture",
            "position_hint": "directly in front of number 14 in the conversation zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 17,
            "label": "egg-carton acoustic treatment",
            "category": "prop",
            "position_hint": "temporarily covering broad sections of the rehearsal-zone perimeter walls",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 16,
            "label": "newspaper meal spread",
            "category": "prop",
            "position_hint": "temporarily spread across the office desks during early occupancy",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "portable cassette recorder",
            "category": "prop",
            "position_hint": "carried through or placed near the entrance during the intimate nighttime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "stacked cassette tape boxes",
            "category": "prop",
            "position_hint": "temporarily stacked in the north-west storage zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L48B04": {
        "bg_id": "L48B04",
        "fp_id": "fp_l48_office",
        "use_numbered_elements": [
          1,
          3,
          5,
          6,
          7,
          12,
          14,
          15,
          18
        ],
        "ignore_numbered_elements": [
          16,
          17,
          19
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared work zone",
            "category": "area",
            "position_hint": "west and central portion of the open office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "conversation zone",
            "category": "area",
            "position_hint": "south-east portion of the office around the sofa",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "sunken entry threshold",
            "category": "area",
            "position_hint": "south-west corner at the bottom of the exterior stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south-west wall connecting the recessed threshold to the office",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "high semi-basement window",
            "category": "opening",
            "position_hint": "north exterior wall above floor level",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "upright piano",
            "category": "furniture",
            "position_hint": "north-east wall facing the rehearsal zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "sofa",
            "category": "furniture",
            "position_hint": "south-east wall, oriented toward the entrance sightline",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "low table",
            "category": "furniture",
            "position_hint": "directly in front of number 14 in the conversation zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 18,
            "label": "portable cassette recorder",
            "category": "prop",
            "position_hint": "carried through or placed near the entrance during the intimate nighttime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 16,
            "label": "newspaper meal spread",
            "category": "prop",
            "position_hint": "temporarily spread across the office desks during early occupancy",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "egg-carton acoustic treatment",
            "category": "prop",
            "position_hint": "temporarily covering broad sections of the rehearsal-zone perimeter walls",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "stacked cassette tape boxes",
            "category": "prop",
            "position_hint": "temporarily stacked in the north-west storage zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          3,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L48B03": {
        "bg_id": "L48B03",
        "fp_id": "fp_l48_office",
        "use_numbered_elements": [
          1,
          4,
          5,
          6,
          7,
          11,
          13,
          19
        ],
        "ignore_numbered_elements": [
          16,
          17,
          18
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared work zone",
            "category": "area",
            "position_hint": "west and central portion of the open office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "storage and equipment zone",
            "category": "area",
            "position_hint": "north-west edge of the office beside wall shelving",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "sunken entry threshold",
            "category": "area",
            "position_hint": "south-west corner at the bottom of the exterior stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south-west wall connecting the recessed threshold to the office",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "high semi-basement window",
            "category": "opening",
            "position_hint": "north exterior wall above floor level",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "wall shelving bank",
            "category": "furniture",
            "position_hint": "north-west wall within the storage zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "analog audio console",
            "category": "furniture",
            "position_hint": "east wall between the piano and conversation zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 19,
            "label": "stacked cassette tape boxes",
            "category": "prop",
            "position_hint": "temporarily stacked in the north-west storage zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 16,
            "label": "newspaper meal spread",
            "category": "prop",
            "position_hint": "temporarily spread across the office desks during early occupancy",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "egg-carton acoustic treatment",
            "category": "prop",
            "position_hint": "temporarily covering broad sections of the rehearsal-zone perimeter walls",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "portable cassette recorder",
            "category": "prop",
            "position_hint": "carried through or placed near the entrance during the intimate nighttime scene",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L49B01": {
        "bg_id": "L49B01",
        "fp_id": "fp_l49_flooded_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          15,
          16,
          17,
          18,
          19,
          20
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared office room",
            "category": "area",
            "position_hint": "center of the broad rectangular semi-basement interior",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entrance threshold zone",
            "category": "area",
            "position_hint": "east side of the office immediately inside the entrance door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "service and storage zone",
            "category": "area",
            "position_hint": "narrow strip along the west wall containing music and storage furniture",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "sunken window well",
            "category": "area",
            "position_hint": "outside the north wall directly beyond the low window",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "east wall beside the lower stair landing, swinging inward into the threshold zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "low street-facing window",
            "category": "opening",
            "position_hint": "north wall above the sunken exterior window well",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "sofa",
            "category": "furniture",
            "position_hint": "against the south wall, facing inward toward the low table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "low table",
            "category": "furniture",
            "position_hint": "directly in front of the sofa with clearance on both sides",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "work desk and chairs",
            "category": "furniture",
            "position_hint": "southeast portion of the shared room without blocking the entrance route",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "bookcase",
            "category": "furniture",
            "position_hint": "west wall within the service and storage zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "upright piano",
            "category": "furniture",
            "position_hint": "southwest corner beside the service and storage zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "analog audio equipment cabinet",
            "category": "prop",
            "position_hint": "west wall between the bookcase and upright piano",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "improvised acoustic wall lining",
            "category": "prop",
            "position_hint": "fixed along portions of the west and south interior walls",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "rapidly rising floodwater",
            "category": "area",
            "position_hint": "covering the office floor and rising throughout the shared and threshold zones",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "broken window glazing",
            "category": "opening",
            "position_hint": "at the low north-wall window after the escape attempt",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "floating sheet music and loose clutter",
            "category": "prop",
            "position_hint": "drifting across the shared room between the sofa, table, and window",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "displaced wooden stool",
            "category": "furniture",
            "position_hint": "near the low window after being carried from the room and used to strike the glazing",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "floating record album",
            "category": "prop",
            "position_hint": "on the floodwater near the center of the shared room",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "cassette recorder",
            "category": "prop",
            "position_hint": "on or drifting beside the low table during the flood sequence",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L56B01": {
        "bg_id": "L56B01",
        "fp_id": "fp_guest_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "narrow guest room",
            "category": "area",
            "position_hint": "main private area occupying most of the plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entrance circulation strip",
            "category": "area",
            "position_hint": "narrow clear route from the entrance door to the low desk",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south wall, opening inward from the lodging corridor",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "sea-facing window",
            "category": "opening",
            "position_hint": "north exterior wall, centered beyond the low desk",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "low writing desk",
            "category": "furniture",
            "position_hint": "north end of the room, directly inside the sea-facing window",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "small desk lamp",
            "category": "prop",
            "position_hint": "on one rear corner of the low writing desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "wastebasket",
            "category": "prop",
            "position_hint": "on the floor beside the low writing desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 8,
            "label": "personal photograph",
            "category": "prop",
            "position_hint": "on the low writing desk within the seated occupant's view",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "sleeping pills",
            "category": "prop",
            "position_hint": "scattered in several groups across the low writing desk",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "empty liquor bottles",
            "category": "prop",
            "position_hint": "clustered on and immediately beside the low writing desk",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "letter sheets and crumpled draft",
            "category": "prop",
            "position_hint": "writing sheets on the low desk, with a discarded crumpled draft in or near the wastebasket",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L57B01": {
        "bg_id": "L57B01",
        "fp_id": "fp_owner_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "owner room floor area",
            "category": "area",
            "position_hint": "main rectangular room area surrounding the central circulation strip",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entrance doorway",
            "category": "opening",
            "position_hint": "south wall near the southeast corner, opening inward",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "corded telephone station",
            "category": "prop",
            "position_hint": "east wall immediately inside the entrance, reachable from the doorway",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "open circulation floor",
            "category": "area",
            "position_hint": "clear strip extending from the entrance into the center of the room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 5,
            "label": "collapsed owner",
            "category": "prop",
            "position_hint": "central floor beside the circulation strip; overlay only, not drawn on the floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "scattered pesticide bottles",
            "category": "prop",
            "position_hint": "scattered around the collapsed owner on the central floor; overlay only, not drawn on the floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "broken telephone state",
            "category": "prop",
            "position_hint": "at number 3, with damaged telephone parts displaced nearby; overlay only, not drawn on the floor plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "crying child",
            "category": "prop",
            "position_hint": "on the floor beside the collapsed owner; overlay only, not drawn on the floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L59B01": {
        "bg_id": "L59B01",
        "fp_id": "fp_l59_emergency_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "Patient care zone",
            "category": "area",
            "position_hint": "central and northeast portion of the emergency room around the medical bed",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "Staff service zone",
            "category": "area",
            "position_hint": "narrow service strip along the east side and head end of the bed",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "Visitor standing zone",
            "category": "area",
            "position_hint": "open south-central area beside the foot and visitor side of the bed",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "Threshold zone",
            "category": "area",
            "position_hint": "southwest corner immediately inside the entrance door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "Medical bed",
            "category": "furniture",
            "position_hint": "center-right of the room, long axis east-west, head toward the east wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "Analog vital-sign monitor",
            "category": "prop",
            "position_hint": "beside the east head corner of the medical bed on a compact equipment stand",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "Oxygen and suction panel",
            "category": "prop",
            "position_hint": "east wall directly behind the head of the medical bed",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "Handwashing sink",
            "category": "prop",
            "position_hint": "northwest wall within the staff service edge",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "Built-in supply cabinet",
            "category": "furniture",
            "position_hint": "west wall north of the entrance and adjacent to the sink",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "Entrance door",
            "category": "opening",
            "position_hint": "southwest wall, swinging inward toward the west wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "Exterior window",
            "category": "opening",
            "position_hint": "north wall above the patient-care side of the room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "Folded privacy screen",
            "category": "furniture",
            "position_hint": "southeast edge of the patient-care zone, parked clear of the visitor path",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 13,
            "label": "Normal vital-sign display",
            "category": "prop",
            "position_hint": "on the display face of number 6 during the stable post-treatment state; do not draw on the base floor plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "Patient connection tubing",
            "category": "prop",
            "position_hint": "temporarily running between number 5, number 6, and number 7; do not draw on the base floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L60B01": {
        "bg_id": "L60B01",
        "fp_id": "fp_l60_hospital_front_yard",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "hospital frontage footprint",
            "category": "area",
            "position_hint": "north side of plan, spanning most of the width",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "main entrance door",
            "category": "opening",
            "position_hint": "center of the north facade, opening onto the exterior threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance threshold",
            "category": "area",
            "position_hint": "directly south of the main entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "approach path",
            "category": "area",
            "position_hint": "straight central path extending south from the entrance threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "central waiting yard",
            "category": "area",
            "position_hint": "broad open area in the center and south half of the plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "left facade window",
            "category": "opening",
            "position_hint": "north facade, left of the main entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "right facade window",
            "category": "opening",
            "position_hint": "north facade, right of the main entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 8,
            "label": "waiting guitarist with shoulder guitar",
            "category": "prop",
            "position_hint": "central waiting yard, slightly west of the approach path and facing the entrance",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L65B02": {
        "bg_id": "L65B02",
        "fp_id": "fp_memorial_hall_theater",
        "use_numbered_elements": [
          1,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          15,
          16,
          17,
          20,
          21,
          22
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "raised performance stage",
            "category": "area",
            "position_hint": "north end, centered beyond the proscenium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "auditorium floor",
            "category": "area",
            "position_hint": "large central and southern portion of the plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "central seating bank",
            "category": "furniture",
            "position_hint": "center of auditorium, facing north toward the stage",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "left seating bank",
            "category": "furniture",
            "position_hint": "west side of auditorium, facing the stage",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "right seating bank",
            "category": "furniture",
            "position_hint": "east side of auditorium, facing the stage",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "center aisle",
            "category": "area",
            "position_hint": "runs north-south through the middle of the auditorium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "left side aisle",
            "category": "area",
            "position_hint": "along the west wall of the auditorium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "right side aisle",
            "category": "area",
            "position_hint": "along the east wall of the auditorium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "proscenium opening",
            "category": "opening",
            "position_hint": "full-width opening between auditorium and stage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "front stage lighting bar",
            "category": "prop",
            "position_hint": "immediately above the stage side of the proscenium line",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "analog keyboard station",
            "category": "prop",
            "position_hint": "stage left, behind and to the left of the central vocalist position",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "guitar performance position",
            "category": "prop",
            "position_hint": "stage right, offset from the central vocalist position",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "wired vocal microphone stand",
            "category": "prop",
            "position_hint": "front-center of the stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "seated audience occupancy",
            "category": "area",
            "position_hint": "distributed across all three auditorium seating banks",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "focused concert spotlight state",
            "category": "prop",
            "position_hint": "focused primarily on the front-center vocalist position with lesser coverage of the side musicians",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          4,
          8,
          9,
          10
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 4, 8, 9, 10]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L67B03": {
        "bg_id": "L67B03",
        "fp_id": "fp_l67_villa_living_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          13
        ],
        "ignore_numbered_elements": [
          12
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared living area",
            "category": "area",
            "position_hint": "central rectangular room occupying most of the plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "lake-facing window bank",
            "category": "opening",
            "position_hint": "centered along the north exterior wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "interior entry door",
            "category": "opening",
            "position_hint": "southwest wall, opening inward toward the threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "long sofa",
            "category": "furniture",
            "position_hint": "west side of the living area, oriented toward the rehearsal space",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "keyboard on stand",
            "category": "furniture",
            "position_hint": "northeast portion of the living area, angled slightly toward the center",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "drum kit",
            "category": "prop",
            "position_hint": "east side of the living area beside the keyboard position",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "lake-side exterior view zone",
            "category": "area",
            "position_hint": "narrow exterior context strip immediately north of the window bank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "entrance threshold area",
            "category": "area",
            "position_hint": "small southwest zone immediately inside the entry door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "low table",
            "category": "furniture",
            "position_hint": "in front of the sofa, between the seating and rehearsal area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 10,
            "label": "cassette recorder",
            "category": "prop",
            "position_hint": "temporarily placed on or beside the low table in front of the sofa",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "drink containers",
            "category": "prop",
            "position_hint": "temporarily scattered around the sofa and low table during the night session",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "loose guitars and bass",
            "category": "prop",
            "position_hint": "variable positions between the sofa, central floor, and rehearsal stations",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 12,
            "label": "loose sheet music",
            "category": "prop",
            "position_hint": "temporarily scattered across the central floor, sofa area, and near the instruments at dawn",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          7,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 7, 8]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L67B02": {
        "bg_id": "L67B02",
        "fp_id": "fp_l67_villa_living_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          12,
          13
        ],
        "ignore_numbered_elements": [
          10,
          11
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared living area",
            "category": "area",
            "position_hint": "central rectangular room occupying most of the plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "lake-facing window bank",
            "category": "opening",
            "position_hint": "centered along the north exterior wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "interior entry door",
            "category": "opening",
            "position_hint": "southwest wall, opening inward toward the threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "long sofa",
            "category": "furniture",
            "position_hint": "west side of the living area, oriented toward the rehearsal space",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "keyboard on stand",
            "category": "furniture",
            "position_hint": "northeast portion of the living area, angled slightly toward the center",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "drum kit",
            "category": "prop",
            "position_hint": "east side of the living area beside the keyboard position",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "lake-side exterior view zone",
            "category": "area",
            "position_hint": "narrow exterior context strip immediately north of the window bank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "entrance threshold area",
            "category": "area",
            "position_hint": "small southwest zone immediately inside the entry door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "low table",
            "category": "furniture",
            "position_hint": "in front of the sofa, between the seating and rehearsal area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "loose sheet music",
            "category": "prop",
            "position_hint": "temporarily scattered across the central floor, sofa area, and near the instruments at dawn",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "loose guitars and bass",
            "category": "prop",
            "position_hint": "variable positions between the sofa, central floor, and rehearsal stations",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 10,
            "label": "cassette recorder",
            "category": "prop",
            "position_hint": "temporarily placed on or beside the low table in front of the sofa",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "drink containers",
            "category": "prop",
            "position_hint": "temporarily scattered around the sofa and low table during the night session",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          7,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 7, 8]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L67B01": {
        "bg_id": "L67B01",
        "fp_id": "fp_l67_villa_living_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          12,
          13
        ],
        "ignore_numbered_elements": [
          10,
          11
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared living area",
            "category": "area",
            "position_hint": "central rectangular room occupying most of the plan",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "lake-facing window bank",
            "category": "opening",
            "position_hint": "centered along the north exterior wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "interior entry door",
            "category": "opening",
            "position_hint": "southwest wall, opening inward toward the threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "long sofa",
            "category": "furniture",
            "position_hint": "west side of the living area, oriented toward the rehearsal space",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "keyboard on stand",
            "category": "furniture",
            "position_hint": "northeast portion of the living area, angled slightly toward the center",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "drum kit",
            "category": "prop",
            "position_hint": "east side of the living area beside the keyboard position",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "lake-side exterior view zone",
            "category": "area",
            "position_hint": "narrow exterior context strip immediately north of the window bank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "entrance threshold area",
            "category": "area",
            "position_hint": "small southwest zone immediately inside the entry door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "low table",
            "category": "furniture",
            "position_hint": "in front of the sofa, between the seating and rehearsal area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "loose sheet music",
            "category": "prop",
            "position_hint": "temporarily scattered across the central floor, sofa area, and near the instruments at dawn",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "loose guitars and bass",
            "category": "prop",
            "position_hint": "variable positions between the sofa, central floor, and rehearsal stations",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 10,
            "label": "cassette recorder",
            "category": "prop",
            "position_hint": "temporarily placed on or beside the low table in front of the sofa",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "drink containers",
            "category": "prop",
            "position_hint": "temporarily scattered around the sofa and low table during the night session",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          7,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 7, 8]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L68B01": {
        "bg_id": "L68B01",
        "fp_id": "fp_l68_villa_bathroom",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "compact bathroom area",
            "category": "area",
            "position_hint": "entire enclosed rectangular room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "inward-swinging bathroom door",
            "category": "opening",
            "position_hint": "south wall near southwest corner",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "floor-mounted toilet",
            "category": "prop",
            "position_hint": "north end against west wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "small wall-mounted sink",
            "category": "prop",
            "position_hint": "east wall near entrance",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "shower faucet and shower head",
            "category": "prop",
            "position_hint": "north wall beside toilet zone",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "floor drain",
            "category": "prop",
            "position_hint": "open wet-floor area near room center",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "small high window",
            "category": "opening",
            "position_hint": "north wall above fixture level",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1
        ],
        "dominant_target_unit_marker_number": 1,
        "clean_background_expected": true,
        "diagnostics": []
      },
      "L69B01": {
        "bg_id": "L69B01",
        "fp_id": "fp_record_company_president_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          15
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "executive office unit",
            "category": "area",
            "position_hint": "entire rectangular office enclosure",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "work zone",
            "category": "area",
            "position_hint": "east half of office beside exterior windows",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "shared seating zone",
            "category": "area",
            "position_hint": "central and northwest portion of office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "media zone",
            "category": "area",
            "position_hint": "south side of shared seating zone",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "threshold zone",
            "category": "area",
            "position_hint": "southwest corner immediately inside entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "corridor entrance door",
            "category": "opening",
            "position_hint": "south wall at southwest corner, opening inward toward threshold zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "exterior window bank",
            "category": "opening",
            "position_hint": "north wall spanning most of the work and seating zones",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "executive desk",
            "category": "furniture",
            "position_hint": "northeast work zone, oriented toward the seating area and entrance",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "executive desk chair",
            "category": "furniture",
            "position_hint": "north side of executive desk, facing southwest",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "long visitor sofa",
            "category": "furniture",
            "position_hint": "west side of shared seating zone, facing east",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "opposing visitor sofa",
            "category": "furniture",
            "position_hint": "east side of shared seating zone, facing west",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "coffee table",
            "category": "furniture",
            "position_hint": "center of shared seating zone between the two sofas",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "media credenza with cassette deck",
            "category": "furniture",
            "position_hint": "south wall beside shared seating zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "built-in storage cabinets",
            "category": "furniture",
            "position_hint": "east wall behind or beside executive desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "cassette tape in active use",
            "category": "prop",
            "position_hint": "at the cassette deck in the south-side media zone; overlay only and not drawn on the floor plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L76B01": {
        "bg_id": "L76B01",
        "fp_id": "fp_l76_backstage_passage",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "cramped backstage passage",
            "category": "area",
            "position_hint": "central narrow circulation strip running from south to north",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "stacked equipment cases",
            "category": "prop",
            "position_hint": "west side of passage, projecting into the circulation route",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "analog equipment rack",
            "category": "prop",
            "position_hint": "east side of passage near the stage end",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "curtained stage opening",
            "category": "opening",
            "position_hint": "north end of passage, opening toward the stage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "visible stage edge",
            "category": "area",
            "position_hint": "directly north of the curtained stage opening",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "backstage access opening",
            "category": "opening",
            "position_hint": "south end of passage, opposite the stage opening",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L76B02": {
        "bg_id": "L76B02",
        "fp_id": "fp_l76_backstage_passage",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "cramped backstage passage",
            "category": "area",
            "position_hint": "central narrow circulation strip running from south to north",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "stacked equipment cases",
            "category": "prop",
            "position_hint": "west side of passage, projecting into the circulation route",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "analog equipment rack",
            "category": "prop",
            "position_hint": "east side of passage near the stage end",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "curtained stage opening",
            "category": "opening",
            "position_hint": "north end of passage, opening toward the stage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "visible stage edge",
            "category": "area",
            "position_hint": "directly north of the curtained stage opening",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L74B02": {
        "bg_id": "L74B02",
        "fp_id": "fp_l74_theater",
        "use_numbered_elements": [
          3,
          4,
          10,
          11,
          15,
          16,
          17
        ],
        "ignore_numbered_elements": [
          18,
          19,
          20
        ],
        "base_markers_to_reference": [
          {
            "number": 3,
            "label": "backstage waiting area",
            "category": "area",
            "position_hint": "north of stage, spanning the rear service side",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "left stage wing",
            "category": "area",
            "position_hint": "west side of stage between backstage and proscenium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "backstage service door",
            "category": "opening",
            "position_hint": "northwest exterior wall of backstage area",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "left stage access opening",
            "category": "opening",
            "position_hint": "between backstage area and left stage wing",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "backstage waiting bench",
            "category": "furniture",
            "position_hint": "along north wall of backstage waiting area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "built-in equipment shelving",
            "category": "prop",
            "position_hint": "along east wall of backstage waiting area",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 17,
            "label": "tense waiting musicians",
            "category": "prop",
            "position_hint": "inside backstage waiting area near left stage access",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 18,
            "label": "packed cheering audience",
            "category": "prop",
            "position_hint": "throughout both auditorium seating banks",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "raised audience placards",
            "category": "prop",
            "position_hint": "distributed above the occupied auditorium seats",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "performing band and analog instruments",
            "category": "prop",
            "position_hint": "center and front portion of stage area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          3,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L74B01": {
        "bg_id": "L74B01",
        "fp_id": "fp_l74_theater",
        "use_numbered_elements": [
          1,
          2,
          4,
          5,
          6,
          7,
          8,
          9,
          11,
          12,
          13,
          14,
          18,
          19,
          20
        ],
        "ignore_numbered_elements": [
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "stage area",
            "category": "area",
            "position_hint": "north end of theater, centered behind proscenium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "auditorium area",
            "category": "area",
            "position_hint": "large central and southern portion facing the stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "left stage wing",
            "category": "area",
            "position_hint": "west side of stage between backstage and proscenium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "right stage wing",
            "category": "area",
            "position_hint": "east side of stage between backstage and proscenium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "left seating bank",
            "category": "furniture",
            "position_hint": "west half of auditorium, arranged in dense forward-facing rows",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "right seating bank",
            "category": "furniture",
            "position_hint": "east half of auditorium, arranged in dense forward-facing rows",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "center aisle",
            "category": "area",
            "position_hint": "centerline of auditorium from rear entrance to stage apron",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "rear auditorium entrance",
            "category": "opening",
            "position_hint": "center of south wall behind the audience seating",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "left stage access opening",
            "category": "opening",
            "position_hint": "between backstage area and left stage wing",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "right stage access opening",
            "category": "opening",
            "position_hint": "between backstage area and right stage wing",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "analog sound console",
            "category": "prop",
            "position_hint": "rear southwest side of auditorium facing the stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "proscenium curtain",
            "category": "prop",
            "position_hint": "across north edge of stage opening",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 18,
            "label": "packed cheering audience",
            "category": "prop",
            "position_hint": "throughout both auditorium seating banks",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "raised audience placards",
            "category": "prop",
            "position_hint": "distributed above the occupied auditorium seats",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "performing band and analog instruments",
            "category": "prop",
            "position_hint": "center and front portion of stage area",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 17,
            "label": "tense waiting musicians",
            "category": "prop",
            "position_hint": "inside backstage waiting area near left stage access",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          4,
          5,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 4, 5, 8]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L75B01": {
        "bg_id": "L75B01",
        "fp_id": "fp_interview_room",
        "use_numbered_elements": [
          1,
          2,
          5,
          6,
          7,
          8,
          9,
          10,
          11
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "panel zone",
            "category": "area",
            "position_hint": "north third of the interview room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "candidate zone",
            "category": "area",
            "position_hint": "center and south-central portion of the interview room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "north side window",
            "category": "opening",
            "position_hint": "east wall beside the panel zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "south side window",
            "category": "opening",
            "position_hint": "east wall beside the candidate zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "panel table",
            "category": "furniture",
            "position_hint": "centered across the panel zone with its long axis east-west",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "left interviewer chair",
            "category": "furniture",
            "position_hint": "north side of the panel table, western seat",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "center interviewer chair",
            "category": "furniture",
            "position_hint": "north side of the panel table, central seat",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "right interviewer chair",
            "category": "furniture",
            "position_hint": "north side of the panel table, eastern seat",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "candidate chair",
            "category": "furniture",
            "position_hint": "south-central candidate zone, centered and facing north toward the panel table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L78B02": {
        "bg_id": "L78B02",
        "fp_id": "fp_l78_main_dining_room",
        "use_numbered_elements": [
          1,
          2,
          4,
          5,
          6,
          8,
          9,
          12,
          13,
          14,
          15,
          16
        ],
        "ignore_numbered_elements": [
          17,
          18
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "main dining zone",
            "category": "area",
            "position_hint": "central and southern majority of the rectangular restaurant interior",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entrance threshold zone",
            "category": "area",
            "position_hint": "southeast corner immediately inside the customer entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "central exit aisle",
            "category": "area",
            "position_hint": "clear north-south circulation strip between the dining tables and entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "customer entrance door",
            "category": "opening",
            "position_hint": "south wall near the southeast corner, opening inward toward the threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "paired storefront windows",
            "category": "opening",
            "position_hint": "south wall to the west of the customer entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "kitchen pass-through opening",
            "category": "opening",
            "position_hint": "north partition above and behind the service counter",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "service counter",
            "category": "prop",
            "position_hint": "across the north edge of the dining zone, facing the tables",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "main table and chair set",
            "category": "furniture",
            "position_hint": "center of the dining zone, immediately west of the central aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "neighboring table and chair set",
            "category": "furniture",
            "position_hint": "east side of the dining zone beside the main table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "rear dining table and chair set",
            "category": "furniture",
            "position_hint": "northwest part of the dining zone near the service counter",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "front side table and chair set",
            "category": "furniture",
            "position_hint": "southwest part of the dining zone near the storefront windows",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 16,
            "label": "standing liquor bottles and glasses",
            "category": "prop",
            "position_hint": "on the main and neighboring dining tables during the tense drinking and confrontation moments",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 17,
            "label": "overturned table and chairs state",
            "category": "furniture",
            "position_hint": "around the central dining tables during the brawl",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "shattered bottles and broken white plates",
            "category": "prop",
            "position_hint": "scattered across the floor around the central dining tables during the brawl",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L78B01": {
        "bg_id": "L78B01",
        "fp_id": "fp_l78_main_dining_room",
        "use_numbered_elements": [
          1,
          2,
          4,
          5,
          6,
          9,
          12,
          13,
          14,
          15,
          16
        ],
        "ignore_numbered_elements": [
          17,
          18
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "main dining zone",
            "category": "area",
            "position_hint": "central and southern majority of the rectangular restaurant interior",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entrance threshold zone",
            "category": "area",
            "position_hint": "southeast corner immediately inside the customer entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "central exit aisle",
            "category": "area",
            "position_hint": "clear north-south circulation strip between the dining tables and entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "customer entrance door",
            "category": "opening",
            "position_hint": "south wall near the southeast corner, opening inward toward the threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "paired storefront windows",
            "category": "opening",
            "position_hint": "south wall to the west of the customer entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "service counter",
            "category": "prop",
            "position_hint": "across the north edge of the dining zone, facing the tables",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "main table and chair set",
            "category": "furniture",
            "position_hint": "center of the dining zone, immediately west of the central aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "neighboring table and chair set",
            "category": "furniture",
            "position_hint": "east side of the dining zone beside the main table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "rear dining table and chair set",
            "category": "furniture",
            "position_hint": "northwest part of the dining zone near the service counter",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "front side table and chair set",
            "category": "furniture",
            "position_hint": "southwest part of the dining zone near the storefront windows",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 16,
            "label": "standing liquor bottles and glasses",
            "category": "prop",
            "position_hint": "on the main and neighboring dining tables during the tense drinking and confrontation moments",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 17,
            "label": "overturned table and chairs state",
            "category": "furniture",
            "position_hint": "around the central dining tables during the brawl",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "shattered bottles and broken white plates",
            "category": "prop",
            "position_hint": "scattered across the floor around the central dining tables during the brawl",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L78B03": {
        "bg_id": "L78B03",
        "fp_id": "fp_l78_main_dining_room",
        "use_numbered_elements": [
          1,
          2,
          4,
          5,
          6,
          8,
          9,
          12,
          13,
          14,
          15,
          17,
          18
        ],
        "ignore_numbered_elements": [
          16
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "main dining zone",
            "category": "area",
            "position_hint": "central and southern majority of the rectangular restaurant interior",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entrance threshold zone",
            "category": "area",
            "position_hint": "southeast corner immediately inside the customer entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "central exit aisle",
            "category": "area",
            "position_hint": "clear north-south circulation strip between the dining tables and entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "customer entrance door",
            "category": "opening",
            "position_hint": "south wall near the southeast corner, opening inward toward the threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "paired storefront windows",
            "category": "opening",
            "position_hint": "south wall to the west of the customer entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "kitchen pass-through opening",
            "category": "opening",
            "position_hint": "north partition above and behind the service counter",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "service counter",
            "category": "prop",
            "position_hint": "across the north edge of the dining zone, facing the tables",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "main table and chair set",
            "category": "furniture",
            "position_hint": "center of the dining zone, immediately west of the central aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "neighboring table and chair set",
            "category": "furniture",
            "position_hint": "east side of the dining zone beside the main table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "rear dining table and chair set",
            "category": "furniture",
            "position_hint": "northwest part of the dining zone near the service counter",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "front side table and chair set",
            "category": "furniture",
            "position_hint": "southwest part of the dining zone near the storefront windows",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 17,
            "label": "overturned table and chairs state",
            "category": "furniture",
            "position_hint": "around the central dining tables during the brawl",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "shattered bottles and broken white plates",
            "category": "prop",
            "position_hint": "scattered across the floor around the central dining tables during the brawl",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 16,
            "label": "standing liquor bottles and glasses",
            "category": "prop",
            "position_hint": "on the main and neighboring dining tables during the tense drinking and confrontation moments",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          4
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L84B01": {
        "bg_id": "L84B01",
        "fp_id": "fp_l84_clinic_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "treatment area",
            "category": "area",
            "position_hint": "main central and western portion of the clinic room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entrance threshold area",
            "category": "area",
            "position_hint": "narrow zone along the east side beside the entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "open entrance doorway",
            "category": "opening",
            "position_hint": "east wall near the southeast corner, opening inward toward the threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "north window",
            "category": "opening",
            "position_hint": "north wall above the treatment side of the room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "west window",
            "category": "opening",
            "position_hint": "west wall near the examination area",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "consultation desk",
            "category": "furniture",
            "position_hint": "center of the treatment area, oriented so the doorway remains visible",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "patient chair",
            "category": "furniture",
            "position_hint": "south side of the consultation desk",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "clinician chair",
            "category": "furniture",
            "position_hint": "north side of the consultation desk",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "examination cot",
            "category": "furniture",
            "position_hint": "northwest side of the treatment area, long edge parallel to the west wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "built-in medicine cabinet",
            "category": "furniture",
            "position_hint": "north wall between the north window and northeast corner",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "clinical sink",
            "category": "prop",
            "position_hint": "northeast corner near the medicine cabinet",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L85B01": {
        "bg_id": "L85B01",
        "fp_id": "fp_l85_residence_yard",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "open residence yard",
            "category": "area",
            "position_hint": "central and outer portion of the plan, extending away from the house",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "house edge zone",
            "category": "area",
            "position_hint": "along the north side of the yard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "house threshold strip",
            "category": "area",
            "position_hint": "narrow band between the house edge and open yard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "raised outdoor wooden platform",
            "category": "furniture",
            "position_hint": "beside the house threshold, offset from the exterior door",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "exterior house door",
            "category": "opening",
            "position_hint": "yard-facing house wall beside the raised platform",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "yard-facing window",
            "category": "opening",
            "position_hint": "yard-facing house wall adjacent to the exterior door",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 7,
            "label": "low serving table with food",
            "category": "prop",
            "position_hint": "center of the raised outdoor platform during the night gathering",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "accumulated bottles",
            "category": "prop",
            "position_hint": "clustered on and beside the serving table during the night gathering",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "acoustic guitar",
            "category": "prop",
            "position_hint": "on the occupied side of the raised platform during the night gathering",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L86B01": {
        "bg_id": "L86B01",
        "fp_id": "fp_l86_residence_room",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "private sleeping zone",
            "category": "area",
            "position_hint": "rear half of the room, along the north wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "shared sitting zone",
            "category": "area",
            "position_hint": "central and southeast portion of the room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "entrance threshold zone",
            "category": "area",
            "position_hint": "southwest corner immediately inside the doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "entrance door",
            "category": "opening",
            "position_hint": "south wall near the southwest corner, swinging inward",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "exterior window",
            "category": "opening",
            "position_hint": "east wall beside the sleeping zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "low table",
            "category": "furniture",
            "position_hint": "center of the shared sitting zone, close to the sleeping area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "floor bedding",
            "category": "furniture",
            "position_hint": "laid lengthwise against the north wall in the private sleeping zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "storage cabinet",
            "category": "furniture",
            "position_hint": "west wall between the threshold and sleeping zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 9,
            "label": "handwritten note",
            "category": "prop",
            "position_hint": "on top of the low table, separate from the sheet music",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "handwritten sheet music",
            "category": "prop",
            "position_hint": "spread on top of the low table beneath or beside the note",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          1,
          2,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L88B02": {
        "bg_id": "L88B02",
        "fp_id": "fp_l88_auditorium",
        "use_numbered_elements": [
          2,
          3,
          4,
          6,
          9,
          10,
          14,
          15,
          17
        ],
        "ignore_numbered_elements": [
          12,
          13,
          16
        ],
        "base_markers_to_reference": [
          {
            "number": 2,
            "label": "performance stage",
            "category": "area",
            "position_hint": "north end of the auditorium beyond the proscenium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "backstage waiting area",
            "category": "area",
            "position_hint": "behind and slightly west of the performance stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "stage-wing entrance",
            "category": "opening",
            "position_hint": "west side of the stage, connecting the backstage route to the performance area",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "proscenium opening",
            "category": "opening",
            "position_hint": "broad opening between the audience hall and performance stage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "backstage internal doorway",
            "category": "opening",
            "position_hint": "rear edge of the backstage waiting area, connecting to the stage-side passage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "overhead stage-light bars",
            "category": "prop",
            "position_hint": "fixed above the front and middle portions of the performance stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "bright active stage lighting",
            "category": "prop",
            "position_hint": "concert-state illumination concentrated on the performance stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "crossing performer traffic",
            "category": "prop",
            "position_hint": "at the stage-wing entrance where outgoing performers pass an entering soloist",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "acoustic guitar and harmonica",
            "category": "prop",
            "position_hint": "carried through the stage-wing entrance by the entering solo performer",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 12,
            "label": "concert banner",
            "category": "prop",
            "position_hint": "temporarily suspended across the rear wall of the performance stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "packed audience",
            "category": "prop",
            "position_hint": "occupying the fixed seating rows during the live concert",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "post-performance drink service",
            "category": "prop",
            "position_hint": "bottle and small cups temporarily placed on the backstage waiting table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          2,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([2, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L88B01": {
        "bg_id": "L88B01",
        "fp_id": "fp_l88_auditorium",
        "use_numbered_elements": [
          1,
          2,
          5,
          6,
          10,
          11,
          12,
          13,
          14
        ],
        "ignore_numbered_elements": [
          15,
          16,
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "auditorium seating zone",
            "category": "area",
            "position_hint": "south and central portion of the plan, facing the stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "performance stage",
            "category": "area",
            "position_hint": "north end of the auditorium beyond the proscenium",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "fixed seating rows",
            "category": "furniture",
            "position_hint": "organized in repeated rows throughout the auditorium seating zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "proscenium opening",
            "category": "opening",
            "position_hint": "broad opening between the audience hall and performance stage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "overhead stage-light bars",
            "category": "prop",
            "position_hint": "fixed above the front and middle portions of the performance stage",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "central auditorium aisle",
            "category": "area",
            "position_hint": "running north-south through the fixed seating rows toward the stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "concert banner",
            "category": "prop",
            "position_hint": "temporarily suspended across the rear wall of the performance stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "packed audience",
            "category": "prop",
            "position_hint": "occupying the fixed seating rows during the live concert",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "bright active stage lighting",
            "category": "prop",
            "position_hint": "concert-state illumination concentrated on the performance stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "crossing performer traffic",
            "category": "prop",
            "position_hint": "at the stage-wing entrance where outgoing performers pass an entering soloist",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "post-performance drink service",
            "category": "prop",
            "position_hint": "bottle and small cups temporarily placed on the backstage waiting table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "acoustic guitar and harmonica",
            "category": "prop",
            "position_hint": "carried through the stage-wing entrance by the entering solo performer",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          11
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 11]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L88B03": {
        "bg_id": "L88B03",
        "fp_id": "fp_l88_auditorium",
        "use_numbered_elements": [
          3,
          4,
          7,
          8,
          9,
          16
        ],
        "ignore_numbered_elements": [
          12,
          13,
          14,
          15,
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 3,
            "label": "backstage waiting area",
            "category": "area",
            "position_hint": "behind and slightly west of the performance stage",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "stage-wing entrance",
            "category": "opening",
            "position_hint": "west side of the stage, connecting the backstage route to the performance area",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "backstage waiting table",
            "category": "furniture",
            "position_hint": "central portion of the backstage waiting area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "backstage waiting chairs",
            "category": "furniture",
            "position_hint": "grouped around the waiting table in the backstage area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "backstage internal doorway",
            "category": "opening",
            "position_hint": "rear edge of the backstage waiting area, connecting to the stage-side passage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 16,
            "label": "post-performance drink service",
            "category": "prop",
            "position_hint": "bottle and small cups temporarily placed on the backstage waiting table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 12,
            "label": "concert banner",
            "category": "prop",
            "position_hint": "temporarily suspended across the rear wall of the performance stage",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "packed audience",
            "category": "prop",
            "position_hint": "occupying the fixed seating rows during the live concert",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "bright active stage lighting",
            "category": "prop",
            "position_hint": "concert-state illumination concentrated on the performance stage",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "crossing performer traffic",
            "category": "prop",
            "position_hint": "at the stage-wing entrance where outgoing performers pass an entering soloist",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "acoustic guitar and harmonica",
            "category": "prop",
            "position_hint": "carried through the stage-wing entrance by the entering solo performer",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          3
        ],
        "dominant_target_unit_marker_number": 3,
        "clean_background_expected": false,
        "diagnostics": []
      }
    }
  },
  "step_id": "floor_plan_overlay_payload",
  "run_id": "00787f22-a8f0-4583-9094-cc02b1dabb6f",
  "resolved_model": "gpt",
  "updated_at": "2026-08-10T17:56:07.789180+00:00",
  "project_config_snapshot": {}
}