{
  "status": "completed",
  "applicable_count": 1,
  "completed_count": 1,
  "failed_count": 0,
  "schema_version": 1,
  "config_hash": "5d2891ceb277be8d",
  "data": {
    "overlays": {
      "L03B01": {
        "bg_id": "L03B01",
        "fp_id": "fp_l03_rooftop_exterior",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10
        ],
        "ignore_numbered_elements": [
          11,
          12,
          13,
          14,
          15
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "rooftop deck",
            "category": "area",
            "position_hint": "open exterior area surrounding the rooftop room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "rooftop room footprint",
            "category": "area",
            "position_hint": "northwest portion of the rooftop deck",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "stair arrival landing",
            "category": "area",
            "position_hint": "southeast edge of the roof, connected to the entry path",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "iron entry door",
            "category": "opening",
            "position_hint": "south wall of the rooftop room, facing the stair arrival",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "south window",
            "category": "opening",
            "position_hint": "south wall of the rooftop room beside the iron entry door",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "east window",
            "category": "opening",
            "position_hint": "east wall of the rooftop room overlooking the deck",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "rooftop water tank",
            "category": "prop",
            "position_hint": "northeast service pad beside the rooftop room",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "perimeter parapet",
            "category": "area",
            "position_hint": "continuous boundary around the outer edge of the roof",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "fixed clothesline",
            "category": "prop",
            "position_hint": "stretched across the southern open deck",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "drying platform",
            "category": "furniture",
            "position_hint": "south-central deck beneath the clothesline",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [
          {
            "number": 11,
            "label": "door-gap advertising flyer",
            "category": "prop",
            "position_hint": "caught in the gap of the iron entry door during forced entry",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "loose dried herb leaves",
            "category": "prop",
            "position_hint": "scattered from the drying platform across the night entry path",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "forced-open door state",
            "category": "opening",
            "position_hint": "iron entry door left slightly open after its lock is bypassed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "intruder approach shadow",
            "category": "prop",
            "position_hint": "long shadow extending across the deck toward the iron entry door",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "reflected attack silhouette",
            "category": "prop",
            "position_hint": "visible only as a shadowed reflection in the south window during the attack",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 8]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L03B02": {
        "bg_id": "L03B02",
        "fp_id": "fp_l03_rooftop_exterior",
        "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": "rooftop deck",
            "category": "area",
            "position_hint": "open exterior area surrounding the rooftop room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "rooftop room footprint",
            "category": "area",
            "position_hint": "northwest portion of the rooftop deck",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "stair arrival landing",
            "category": "area",
            "position_hint": "southeast edge of the roof, connected to the entry path",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "iron entry door",
            "category": "opening",
            "position_hint": "south wall of the rooftop room, facing the stair arrival",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "south window",
            "category": "opening",
            "position_hint": "south wall of the rooftop room beside the iron entry door",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "east window",
            "category": "opening",
            "position_hint": "east wall of the rooftop room overlooking the deck",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "rooftop water tank",
            "category": "prop",
            "position_hint": "northeast service pad beside the rooftop room",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "perimeter parapet",
            "category": "area",
            "position_hint": "continuous boundary around the outer edge of the roof",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "fixed clothesline",
            "category": "prop",
            "position_hint": "stretched across the southern open deck",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "drying platform",
            "category": "furniture",
            "position_hint": "south-central deck beneath the clothesline",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 11,
            "label": "door-gap advertising flyer",
            "category": "prop",
            "position_hint": "caught in the gap of the iron entry door during forced entry",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "loose dried herb leaves",
            "category": "prop",
            "position_hint": "scattered from the drying platform across the night entry path",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "forced-open door state",
            "category": "opening",
            "position_hint": "iron entry door left slightly open after its lock is bypassed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "intruder approach shadow",
            "category": "prop",
            "position_hint": "long shadow extending across the deck toward the iron entry door",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "reflected attack silhouette",
            "category": "prop",
            "position_hint": "visible only as a shadowed reflection in the south window during the attack",
            "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,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 8]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B01": {
        "bg_id": "L04B01",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          1,
          2,
          6,
          7,
          8,
          9,
          10,
          13,
          14,
          15,
          16,
          17
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          31,
          32,
          33,
          34,
          35
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared living and dining zone",
            "category": "area",
            "position_hint": "central and southern portion of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "compact kitchen zone",
            "category": "area",
            "position_hint": "west side of the shared zone, beside the bathroom plumbing wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entry threshold",
            "category": "area",
            "position_hint": "southeast edge between the steel entrance door and shared zone",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "steel entrance door",
            "category": "opening",
            "position_hint": "south exterior wall at the entry threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "small living window",
            "category": "opening",
            "position_hint": "south wall of the shared zone, west of the entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "daughter bedroom door",
            "category": "opening",
            "position_hint": "east side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "mother bedroom door",
            "category": "opening",
            "position_hint": "northwest side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "kitchen sink and faucet",
            "category": "furniture",
            "position_hint": "west kitchen counter against the bathroom plumbing wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "kitchen stovetop",
            "category": "furniture",
            "position_hint": "kitchen counter beside the sink",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "dining table",
            "category": "furniture",
            "position_hint": "middle of the shared living and dining zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dining chair set",
            "category": "furniture",
            "position_hint": "arranged around the dining table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "television",
            "category": "furniture",
            "position_hint": "shared-zone wall facing the dining table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "pooled blood and scattered bloodstains",
            "category": "prop",
            "position_hint": "daughter bedroom floor around the open area beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprint trail",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading toward the window curtain",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "corpse behind curtain",
            "category": "prop",
            "position_hint": "seated behind the daughter bedroom curtain",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "irregular red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 28,
            "label": "two teacups with one overturned",
            "category": "prop",
            "position_hint": "on the dining table in the shared zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing red circle vision in bathroom",
            "category": "prop",
            "position_hint": "bathroom wall visible near the sink or mirror",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face vision in family photograph",
            "category": "prop",
            "position_hint": "photograph viewed at the dining table",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "bloodstained old photograph pinned in red circle",
            "category": "prop",
            "position_hint": "center of the red circle on the daughter bedroom wall",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "intruder footprints",
            "category": "prop",
            "position_hint": "across the shared-zone floor from the entrance toward the rooms",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "searched household disorder and overturned chairs",
            "category": "prop",
            "position_hint": "throughout the shared zone, especially around the dining table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "open window and windswept state",
            "category": "prop",
            "position_hint": "at the small living window and adjacent shared-zone floor",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "cooled cooking pot",
            "category": "prop",
            "position_hint": "on the kitchen stovetop",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          6
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 6]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B06": {
        "bg_id": "L04B06",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          1,
          3,
          9,
          10,
          12,
          15,
          17,
          18,
          22,
          23,
          24,
          25,
          26,
          27,
          28,
          35
        ],
        "ignore_numbered_elements": [
          29,
          30,
          31,
          32,
          33,
          34
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared living and dining zone",
            "category": "area",
            "position_hint": "central and southern portion of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "daughter bedroom",
            "category": "area",
            "position_hint": "northeast side of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "daughter bedroom door",
            "category": "opening",
            "position_hint": "east side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "mother bedroom door",
            "category": "opening",
            "position_hint": "northwest side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "daughter bedroom window",
            "category": "opening",
            "position_hint": "exterior wall at the far side of the daughter bedroom",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "dining table",
            "category": "furniture",
            "position_hint": "middle of the shared living and dining zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "television",
            "category": "furniture",
            "position_hint": "shared-zone wall facing the dining table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "daughter bed",
            "category": "furniture",
            "position_hint": "inside the daughter bedroom against an interior wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "bedroom window curtain",
            "category": "prop",
            "position_hint": "across the daughter bedroom window with a narrow space behind it",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "living room floor lamp",
            "category": "furniture",
            "position_hint": "edge of the shared zone near the bedroom doors",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 24,
            "label": "pooled blood and scattered bloodstains",
            "category": "prop",
            "position_hint": "daughter bedroom floor around the open area beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprint trail",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading toward the window curtain",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "corpse behind curtain",
            "category": "prop",
            "position_hint": "seated behind the daughter bedroom curtain",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "irregular red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 28,
            "label": "two teacups with one overturned",
            "category": "prop",
            "position_hint": "on the dining table in the shared zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "cooled cooking pot",
            "category": "prop",
            "position_hint": "on the kitchen stovetop",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 29,
            "label": "vanishing red circle vision in bathroom",
            "category": "prop",
            "position_hint": "bathroom wall visible near the sink or mirror",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face vision in family photograph",
            "category": "prop",
            "position_hint": "photograph viewed at the dining table",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "bloodstained old photograph pinned in red circle",
            "category": "prop",
            "position_hint": "center of the red circle on the daughter bedroom wall",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "intruder footprints",
            "category": "prop",
            "position_hint": "across the shared-zone floor from the entrance toward the rooms",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "searched household disorder and overturned chairs",
            "category": "prop",
            "position_hint": "throughout the shared zone, especially around the dining table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "open window and windswept state",
            "category": "prop",
            "position_hint": "at the small living window and adjacent shared-zone floor",
            "base_layer_decision": "state_overlay_plot_cue",
            "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)"
        ]
      },
      "L04B07": {
        "bg_id": "L04B07",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          3,
          9,
          12,
          18,
          22
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          31,
          32,
          33,
          34,
          35
        ],
        "base_markers_to_reference": [
          {
            "number": 3,
            "label": "daughter bedroom",
            "category": "area",
            "position_hint": "northeast side of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "daughter bedroom door",
            "category": "opening",
            "position_hint": "east side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "daughter bedroom window",
            "category": "opening",
            "position_hint": "exterior wall at the far side of the daughter bedroom",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "daughter bed",
            "category": "furniture",
            "position_hint": "inside the daughter bedroom against an interior wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "bedroom window curtain",
            "category": "prop",
            "position_hint": "across the daughter bedroom window with a narrow space behind it",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "pooled blood and scattered bloodstains",
            "category": "prop",
            "position_hint": "daughter bedroom floor around the open area beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprint trail",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading toward the window curtain",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "corpse behind curtain",
            "category": "prop",
            "position_hint": "seated behind the daughter bedroom curtain",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "irregular red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 28,
            "label": "two teacups with one overturned",
            "category": "prop",
            "position_hint": "on the dining table in the shared zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing red circle vision in bathroom",
            "category": "prop",
            "position_hint": "bathroom wall visible near the sink or mirror",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face vision in family photograph",
            "category": "prop",
            "position_hint": "photograph viewed at the dining table",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "bloodstained old photograph pinned in red circle",
            "category": "prop",
            "position_hint": "center of the red circle on the daughter bedroom wall",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "intruder footprints",
            "category": "prop",
            "position_hint": "across the shared-zone floor from the entrance toward the rooms",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "searched household disorder and overturned chairs",
            "category": "prop",
            "position_hint": "throughout the shared zone, especially around the dining table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "open window and windswept state",
            "category": "prop",
            "position_hint": "at the small living window and adjacent shared-zone floor",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "cooled cooking pot",
            "category": "prop",
            "position_hint": "on the kitchen stovetop",
            "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": true,
        "diagnostics": []
      },
      "L04B05": {
        "bg_id": "L04B05",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          1,
          3,
          4,
          5,
          9,
          10,
          11,
          18,
          19,
          20,
          21,
          22
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          31,
          32,
          33,
          34,
          35
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared living and dining zone",
            "category": "area",
            "position_hint": "central and southern portion of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "daughter bedroom",
            "category": "area",
            "position_hint": "northeast side of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "mother bedroom",
            "category": "area",
            "position_hint": "northwest side of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "bathroom",
            "category": "area",
            "position_hint": "southwest corner beside the kitchen",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "daughter bedroom door",
            "category": "opening",
            "position_hint": "east side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "mother bedroom door",
            "category": "opening",
            "position_hint": "northwest side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "bathroom door",
            "category": "opening",
            "position_hint": "southwest side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "daughter bed",
            "category": "furniture",
            "position_hint": "inside the daughter bedroom against an interior wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "mother bed",
            "category": "furniture",
            "position_hint": "inside the mother bedroom against the north wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "bathroom sink",
            "category": "furniture",
            "position_hint": "inside the bathroom on the shared plumbing wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "toilet",
            "category": "furniture",
            "position_hint": "far corner of the compact bathroom",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "bedroom window curtain",
            "category": "prop",
            "position_hint": "across the daughter bedroom window with a narrow space behind it",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "pooled blood and scattered bloodstains",
            "category": "prop",
            "position_hint": "daughter bedroom floor around the open area beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprint trail",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading toward the window curtain",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "corpse behind curtain",
            "category": "prop",
            "position_hint": "seated behind the daughter bedroom curtain",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "irregular red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 28,
            "label": "two teacups with one overturned",
            "category": "prop",
            "position_hint": "on the dining table in the shared zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing red circle vision in bathroom",
            "category": "prop",
            "position_hint": "bathroom wall visible near the sink or mirror",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face vision in family photograph",
            "category": "prop",
            "position_hint": "photograph viewed at the dining table",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "bloodstained old photograph pinned in red circle",
            "category": "prop",
            "position_hint": "center of the red circle on the daughter bedroom wall",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "intruder footprints",
            "category": "prop",
            "position_hint": "across the shared-zone floor from the entrance toward the rooms",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "searched household disorder and overturned chairs",
            "category": "prop",
            "position_hint": "throughout the shared zone, especially around the dining table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "open window and windswept state",
            "category": "prop",
            "position_hint": "at the small living window and adjacent shared-zone floor",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "cooled cooking pot",
            "category": "prop",
            "position_hint": "on the kitchen stovetop",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          3,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "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)"
        ]
      },
      "L04B04": {
        "bg_id": "L04B04",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          1,
          5,
          11,
          15,
          16,
          20,
          29,
          30
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          31,
          32,
          33,
          34,
          35
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared living and dining zone",
            "category": "area",
            "position_hint": "central and southern portion of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "bathroom",
            "category": "area",
            "position_hint": "southwest corner beside the kitchen",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "bathroom door",
            "category": "opening",
            "position_hint": "southwest side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "dining table",
            "category": "furniture",
            "position_hint": "middle of the shared living and dining zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dining chair set",
            "category": "furniture",
            "position_hint": "arranged around the dining table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "bathroom sink",
            "category": "furniture",
            "position_hint": "inside the bathroom on the shared plumbing wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 29,
            "label": "vanishing red circle vision in bathroom",
            "category": "prop",
            "position_hint": "bathroom wall visible near the sink or mirror",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face vision in family photograph",
            "category": "prop",
            "position_hint": "photograph viewed at the dining table",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "pooled blood and scattered bloodstains",
            "category": "prop",
            "position_hint": "daughter bedroom floor around the open area beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprint trail",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading toward the window curtain",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "corpse behind curtain",
            "category": "prop",
            "position_hint": "seated behind the daughter bedroom curtain",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "irregular red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 28,
            "label": "two teacups with one overturned",
            "category": "prop",
            "position_hint": "on the dining table in the shared zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "bloodstained old photograph pinned in red circle",
            "category": "prop",
            "position_hint": "center of the red circle on the daughter bedroom wall",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "intruder footprints",
            "category": "prop",
            "position_hint": "across the shared-zone floor from the entrance toward the rooms",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "searched household disorder and overturned chairs",
            "category": "prop",
            "position_hint": "throughout the shared zone, especially around the dining table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "open window and windswept state",
            "category": "prop",
            "position_hint": "at the small living window and adjacent shared-zone floor",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "cooled cooking pot",
            "category": "prop",
            "position_hint": "on the kitchen stovetop",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "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)"
        ]
      },
      "L04B02": {
        "bg_id": "L04B02",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          3,
          9,
          12,
          18,
          22,
          27,
          31
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          28,
          29,
          30,
          32,
          33,
          34,
          35
        ],
        "base_markers_to_reference": [
          {
            "number": 3,
            "label": "daughter bedroom",
            "category": "area",
            "position_hint": "northeast side of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "daughter bedroom door",
            "category": "opening",
            "position_hint": "east side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "daughter bedroom window",
            "category": "opening",
            "position_hint": "exterior wall at the far side of the daughter bedroom",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "daughter bed",
            "category": "furniture",
            "position_hint": "inside the daughter bedroom against an interior wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "bedroom window curtain",
            "category": "prop",
            "position_hint": "across the daughter bedroom window with a narrow space behind it",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 27,
            "label": "irregular red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "bloodstained old photograph pinned in red circle",
            "category": "prop",
            "position_hint": "center of the red circle on the daughter bedroom wall",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "pooled blood and scattered bloodstains",
            "category": "prop",
            "position_hint": "daughter bedroom floor around the open area beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprint trail",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading toward the window curtain",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "corpse behind curtain",
            "category": "prop",
            "position_hint": "seated behind the daughter bedroom curtain",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 28,
            "label": "two teacups with one overturned",
            "category": "prop",
            "position_hint": "on the dining table in the shared zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing red circle vision in bathroom",
            "category": "prop",
            "position_hint": "bathroom wall visible near the sink or mirror",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face vision in family photograph",
            "category": "prop",
            "position_hint": "photograph viewed at the dining table",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "intruder footprints",
            "category": "prop",
            "position_hint": "across the shared-zone floor from the entrance toward the rooms",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "searched household disorder and overturned chairs",
            "category": "prop",
            "position_hint": "throughout the shared zone, especially around the dining table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "open window and windswept state",
            "category": "prop",
            "position_hint": "at the small living window and adjacent shared-zone floor",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "cooled cooking pot",
            "category": "prop",
            "position_hint": "on the kitchen stovetop",
            "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": []
      },
      "L04B03": {
        "bg_id": "L04B03",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          1,
          3,
          6,
          7,
          8,
          9,
          15,
          16,
          17,
          18,
          22,
          23,
          32,
          33,
          34
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          31,
          35
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared living and dining zone",
            "category": "area",
            "position_hint": "central and southern portion of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "daughter bedroom",
            "category": "area",
            "position_hint": "northeast side of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entry threshold",
            "category": "area",
            "position_hint": "southeast edge between the steel entrance door and shared zone",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "steel entrance door",
            "category": "opening",
            "position_hint": "south exterior wall at the entry threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "small living window",
            "category": "opening",
            "position_hint": "south wall of the shared zone, west of the entrance",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "daughter bedroom door",
            "category": "opening",
            "position_hint": "east side of the shared zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "dining table",
            "category": "furniture",
            "position_hint": "middle of the shared living and dining zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dining chair set",
            "category": "furniture",
            "position_hint": "arranged around the dining table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "television",
            "category": "furniture",
            "position_hint": "shared-zone wall facing the dining table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "daughter bed",
            "category": "furniture",
            "position_hint": "inside the daughter bedroom against an interior wall",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "bedroom window curtain",
            "category": "prop",
            "position_hint": "across the daughter bedroom window with a narrow space behind it",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "living room floor lamp",
            "category": "furniture",
            "position_hint": "edge of the shared zone near the bedroom doors",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 32,
            "label": "intruder footprints",
            "category": "prop",
            "position_hint": "across the shared-zone floor from the entrance toward the rooms",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "searched household disorder and overturned chairs",
            "category": "prop",
            "position_hint": "throughout the shared zone, especially around the dining table",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "open window and windswept state",
            "category": "prop",
            "position_hint": "at the small living window and adjacent shared-zone floor",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "pooled blood and scattered bloodstains",
            "category": "prop",
            "position_hint": "daughter bedroom floor around the open area beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprint trail",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading toward the window curtain",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "corpse behind curtain",
            "category": "prop",
            "position_hint": "seated behind the daughter bedroom curtain",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "irregular red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or beside the bed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 28,
            "label": "two teacups with one overturned",
            "category": "prop",
            "position_hint": "on the dining table in the shared zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing red circle vision in bathroom",
            "category": "prop",
            "position_hint": "bathroom wall visible near the sink or mirror",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face vision in family photograph",
            "category": "prop",
            "position_hint": "photograph viewed at the dining table",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "bloodstained old photograph pinned in red circle",
            "category": "prop",
            "position_hint": "center of the red circle on the daughter bedroom wall",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "cooled cooking pot",
            "category": "prop",
            "position_hint": "on the kitchen stovetop",
            "base_layer_decision": "state_overlay_transient_object",
            "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)"
        ]
      },
      "L11B02": {
        "bg_id": "L11B02",
        "fp_id": "fp_l11_yard_exterior",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          16,
          18
        ],
        "ignore_numbered_elements": [
          15,
          17
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "courtyard",
            "category": "area",
            "position_hint": "central shared exterior space between the building, wall, gate, and lower staircase",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "main building footprint",
            "category": "area",
            "position_hint": "north side of the site, enclosing the courtyard on one side",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "exterior staircase",
            "category": "area",
            "position_hint": "along the east side of the building, rising from courtyard level toward the roof",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "lower stair landing",
            "category": "area",
            "position_hint": "southeast edge of the courtyard at the foot of the exterior staircase",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "bicycle corner",
            "category": "area",
            "position_hint": "recessed rear corner beside or beneath the lower exterior stair run",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "perimeter wall",
            "category": "area",
            "position_hint": "southwest boundary of the courtyard, opposite the main building",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "vehicle approach",
            "category": "area",
            "position_hint": "narrow exterior lane extending south from the courtyard gate",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "courtyard gate",
            "category": "opening",
            "position_hint": "south boundary between the courtyard and narrow vehicle approach",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "ground entrance door",
            "category": "opening",
            "position_hint": "north wall of the courtyard, opening into the main building",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "rooftop room",
            "category": "area",
            "position_hint": "small inset unit on the roof area of the main building footprint",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "rooftop iron door",
            "category": "opening",
            "position_hint": "stair-facing side of the rooftop room near the top stair landing",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "rooftop window",
            "category": "opening",
            "position_hint": "courtyard-facing exterior wall of the rooftop room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "rooftop water tank",
            "category": "prop",
            "position_hint": "roof area beside the rooftop room, clear of the stair arrival path",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 13,
            "label": "parked bicycle",
            "category": "prop",
            "position_hint": "loosely parked in number 5, the recessed bicycle corner",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "police vehicle",
            "category": "prop",
            "position_hint": "at the courtyard gate or partly within the narrow vehicle approach during the night arrival",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "police emergency lights",
            "category": "prop",
            "position_hint": "flashing state associated with number 14 during the night arrival",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "black cat",
            "category": "prop",
            "position_hint": "on the top edge of the perimeter wall during the dawn view",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "illuminated rooftop window",
            "category": "prop",
            "position_hint": "light visible through number 12 during the dawn courtyard-wall view",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          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, 3, 4, 5, 6, 7, 10]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L11B01": {
        "bg_id": "L11B01",
        "fp_id": "fp_l11_yard_exterior",
        "use_numbered_elements": [
          2,
          3,
          6,
          10,
          12,
          15,
          16,
          17
        ],
        "ignore_numbered_elements": [
          13,
          14,
          18
        ],
        "base_markers_to_reference": [
          {
            "number": 2,
            "label": "main building footprint",
            "category": "area",
            "position_hint": "north side of the site, enclosing the courtyard on one side",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "exterior staircase",
            "category": "area",
            "position_hint": "along the east side of the building, rising from courtyard level toward the roof",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "perimeter wall",
            "category": "area",
            "position_hint": "southwest boundary of the courtyard, opposite the main building",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "rooftop room",
            "category": "area",
            "position_hint": "small inset unit on the roof area of the main building footprint",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "rooftop window",
            "category": "opening",
            "position_hint": "courtyard-facing exterior wall of the rooftop room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "rooftop water tank",
            "category": "prop",
            "position_hint": "roof area beside the rooftop room, clear of the stair arrival path",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "black cat",
            "category": "prop",
            "position_hint": "on the top edge of the perimeter wall during the dawn view",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "illuminated rooftop window",
            "category": "prop",
            "position_hint": "light visible through number 12 during the dawn courtyard-wall view",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 13,
            "label": "parked bicycle",
            "category": "prop",
            "position_hint": "loosely parked in number 5, the recessed bicycle corner",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "police vehicle",
            "category": "prop",
            "position_hint": "at the courtyard gate or partly within the narrow vehicle approach during the night arrival",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "police emergency lights",
            "category": "prop",
            "position_hint": "flashing state associated with number 14 during the night arrival",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          2,
          3,
          6,
          10
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([2, 3, 6, 10]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L12B01": {
        "bg_id": "L12B01",
        "fp_id": "fp_l12_exterior_stairs",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "exterior cement stair run",
            "category": "area",
            "position_hint": "south-to-north rising circulation strip along the outside of the building",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "intermediate stair landing",
            "category": "area",
            "position_hint": "near the upper end of the steep stair run before the final turn",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "rooftop arrival landing",
            "category": "area",
            "position_hint": "north end of the stair run directly outside the rooftop-room entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "iron entrance door",
            "category": "opening",
            "position_hint": "north side of the arrival landing in the rooftop-room exterior wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "door threshold",
            "category": "area",
            "position_hint": "between the rooftop arrival landing and the iron entrance door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "rooftop room footprint",
            "category": "area",
            "position_hint": "north of the arrival landing, entered through the iron door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "rooftop water tank",
            "category": "prop",
            "position_hint": "open rooftop area beside and offset from the arrival route",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "rooftop parapet boundary",
            "category": "area",
            "position_hint": "along the exposed outer edge of the rooftop and stair arrival area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 9,
            "label": "half-open door state",
            "category": "opening",
            "position_hint": "applied to the iron entrance door after the apparent intrusion; not drawn on the base 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,
          5,
          6,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 5, 6, 8]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L15B01": {
        "bg_id": "L15B01",
        "fp_id": "fp_l15_security_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "CCTV service zone",
            "category": "area",
            "position_hint": "rear half of the security office around the surveillance workstation",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "shared observation zone",
            "category": "area",
            "position_hint": "central and front portion of the office behind the operator chair",
            "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": "small zone immediately inside the access door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "CCTV desk",
            "category": "furniture",
            "position_hint": "centered against the rear wall within the service zone",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "monitor bank",
            "category": "prop",
            "position_hint": "along the rear edge of the CCTV desk, facing into the room",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "staff access door",
            "category": "opening",
            "position_hint": "front wall near one corner, opening inward into the threshold zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "operator chair",
            "category": "furniture",
            "position_hint": "directly in front of the CCTV desk and monitor bank",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "visitor seating",
            "category": "furniture",
            "position_hint": "two compact seats in the shared observation zone behind the operator chair",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 9,
            "label": "obscured CCTV playback",
            "category": "prop",
            "position_hint": "confined to the display surfaces of the monitor bank during the tense playback scene",
            "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)"
        ]
      },
      "L14B04": {
        "bg_id": "L14B04",
        "fp_id": "fp_l14_detective_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12
        ],
        "ignore_numbered_elements": [
          13,
          14,
          15,
          16
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared work zone",
            "category": "area",
            "position_hint": "central and northern majority of the rectangular office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entry threshold zone",
            "category": "area",
            "position_hint": "south side of office immediately inside the corridor entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "beverage service zone",
            "category": "area",
            "position_hint": "southwest corner beside the entry threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "corridor entry door",
            "category": "opening",
            "position_hint": "south wall, opening inward beside the entry threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "primary detective desk",
            "category": "furniture",
            "position_hint": "west-central side of shared work zone, oriented toward the central aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "duty officer desk",
            "category": "furniture",
            "position_hint": "east-central side of shared work zone, facing the primary desk across the aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "additional workstation cluster",
            "category": "furniture",
            "position_hint": "north half of shared work zone, arranged as compact opposing desk rows",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "duty desk monitor",
            "category": "prop",
            "position_hint": "on inner edge of duty officer desk, screen angled toward the seated position",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "primary desk monitor",
            "category": "prop",
            "position_hint": "on north edge of primary detective desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "coffee machine counter",
            "category": "prop",
            "position_hint": "against southwest wall within beverage service zone",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "built-in records cabinets",
            "category": "furniture",
            "position_hint": "continuous low cabinet run along west wall north of the beverage nook",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "exterior window banks",
            "category": "opening",
            "position_hint": "two simple window runs distributed along north and east exterior walls",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [
          {
            "number": 13,
            "label": "enlarged crime photographs",
            "category": "prop",
            "position_hint": "scattered across primary detective desk during the deserted daytime state",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "phone GPS result on monitor",
            "category": "prop",
            "position_hint": "displayed only within the duty desk monitor during the tracking-result state",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "missing-person report forms",
            "category": "prop",
            "position_hint": "temporarily held or spread near the duty officer desk during the daytime emergency",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "handwritten coordinate note",
            "category": "prop",
            "position_hint": "small temporary note beside the duty desk monitor before being removed",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "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)"
        ]
      },
      "L14B01": {
        "bg_id": "L14B01",
        "fp_id": "fp_l14_detective_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          15
        ],
        "ignore_numbered_elements": [
          13,
          14,
          16
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared work zone",
            "category": "area",
            "position_hint": "central and northern majority of the rectangular office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entry threshold zone",
            "category": "area",
            "position_hint": "south side of office immediately inside the corridor entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "beverage service zone",
            "category": "area",
            "position_hint": "southwest corner beside the entry threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "corridor entry door",
            "category": "opening",
            "position_hint": "south wall, opening inward beside the entry threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "primary detective desk",
            "category": "furniture",
            "position_hint": "west-central side of shared work zone, oriented toward the central aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "duty officer desk",
            "category": "furniture",
            "position_hint": "east-central side of shared work zone, facing the primary desk across the aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "additional workstation cluster",
            "category": "furniture",
            "position_hint": "north half of shared work zone, arranged as compact opposing desk rows",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "duty desk monitor",
            "category": "prop",
            "position_hint": "on inner edge of duty officer desk, screen angled toward the seated position",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "primary desk monitor",
            "category": "prop",
            "position_hint": "on north edge of primary detective desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "coffee machine counter",
            "category": "prop",
            "position_hint": "against southwest wall within beverage service zone",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "built-in records cabinets",
            "category": "furniture",
            "position_hint": "continuous low cabinet run along west wall north of the beverage nook",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "exterior window banks",
            "category": "opening",
            "position_hint": "two simple window runs distributed along north and east exterior walls",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "missing-person report forms",
            "category": "prop",
            "position_hint": "temporarily held or spread near the duty officer desk during the daytime emergency",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 13,
            "label": "enlarged crime photographs",
            "category": "prop",
            "position_hint": "scattered across primary detective desk during the deserted daytime state",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "phone GPS result on monitor",
            "category": "prop",
            "position_hint": "displayed only within the duty desk monitor during the tracking-result state",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "handwritten coordinate note",
            "category": "prop",
            "position_hint": "small temporary note beside the duty desk monitor before being removed",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "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)"
        ]
      },
      "L14B03": {
        "bg_id": "L14B03",
        "fp_id": "fp_l14_detective_office",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          13,
          14,
          16
        ],
        "ignore_numbered_elements": [
          15
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared work zone",
            "category": "area",
            "position_hint": "central and northern majority of the rectangular office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "entry threshold zone",
            "category": "area",
            "position_hint": "south side of office immediately inside the corridor entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "beverage service zone",
            "category": "area",
            "position_hint": "southwest corner beside the entry threshold",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "corridor entry door",
            "category": "opening",
            "position_hint": "south wall, opening inward beside the entry threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "primary detective desk",
            "category": "furniture",
            "position_hint": "west-central side of shared work zone, oriented toward the central aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "duty officer desk",
            "category": "furniture",
            "position_hint": "east-central side of shared work zone, facing the primary desk across the aisle",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "additional workstation cluster",
            "category": "furniture",
            "position_hint": "north half of shared work zone, arranged as compact opposing desk rows",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "duty desk monitor",
            "category": "prop",
            "position_hint": "on inner edge of duty officer desk, screen angled toward the seated position",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "primary desk monitor",
            "category": "prop",
            "position_hint": "on north edge of primary detective desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "coffee machine counter",
            "category": "prop",
            "position_hint": "against southwest wall within beverage service zone",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "built-in records cabinets",
            "category": "furniture",
            "position_hint": "continuous low cabinet run along west wall north of the beverage nook",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "exterior window banks",
            "category": "opening",
            "position_hint": "two simple window runs distributed along north and east exterior walls",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 13,
            "label": "enlarged crime photographs",
            "category": "prop",
            "position_hint": "scattered across primary detective desk during the deserted daytime state",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "phone GPS result on monitor",
            "category": "prop",
            "position_hint": "displayed only within the duty desk monitor during the tracking-result state",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "handwritten coordinate note",
            "category": "prop",
            "position_hint": "small temporary note beside the duty desk monitor before being removed",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 15,
            "label": "missing-person report forms",
            "category": "prop",
            "position_hint": "temporarily held or spread near the duty officer desk during the daytime emergency",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "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)"
        ]
      },
      "L20B01": {
        "bg_id": "L20B01",
        "fp_id": "fp_l20_deck",
        "use_numbered_elements": [
          1,
          2,
          3,
          5,
          6,
          7,
          8,
          10,
          11,
          12,
          13,
          14
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "open working deck",
            "category": "area",
            "position_hint": "broad exposed foredeck occupying the north and central portion of the vessel",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "wheelhouse control zone",
            "category": "area",
            "position_hint": "compact enclosed deckhouse in the aft third of the vessel",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "cabin threshold",
            "category": "area",
            "position_hint": "small transition area immediately outside the wheelhouse access door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "starboard side passage",
            "category": "area",
            "position_hint": "narrow exterior passage along the starboard side of the wheelhouse, connecting the foredeck to the access door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "helm access door",
            "category": "opening",
            "position_hint": "starboard-forward side of the wheelhouse, opening from the deck threshold into the control zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "forward port wheelhouse window",
            "category": "opening",
            "position_hint": "port half of the forward wheelhouse wall overlooking the working deck",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "forward starboard wheelhouse window",
            "category": "opening",
            "position_hint": "starboard half of the forward wheelhouse wall overlooking the working deck",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "starboard wheelhouse side window",
            "category": "opening",
            "position_hint": "starboard wall of the wheelhouse near the helm access door",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "helm console and steering wheel",
            "category": "furniture",
            "position_hint": "inside the forward starboard portion of the wheelhouse, facing the bow",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "perimeter safety rails",
            "category": "prop",
            "position_hint": "continuous along both sides and around the bow edge of the exposed deck",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 13,
            "label": "old printed photograph",
            "category": "prop",
            "position_hint": "held by a person on the open working deck during the tense examination; not part of the base diagram",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "folded navigation map",
            "category": "prop",
            "position_hint": "held or passed between people on the open working deck; not part of the base diagram",
            "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)"
        ]
      },
      "L21B01": {
        "bg_id": "L21B01",
        "fp_id": "fp_l21_wheelhouse",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10
        ],
        "ignore_numbered_elements": [
          11,
          12,
          13
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "forward control zone",
            "category": "area",
            "position_hint": "forward end of wheelhouse beneath the forward windows",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "central standing zone",
            "category": "area",
            "position_hint": "center of wheelhouse between the console and aft doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "aft threshold zone",
            "category": "area",
            "position_hint": "aft edge of wheelhouse immediately inside the deck doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "helm wheel",
            "category": "furniture",
            "position_hint": "starboard-forward side of the control console",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "marine control console",
            "category": "furniture",
            "position_hint": "across the forward wall below the window bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "forward window bank",
            "category": "opening",
            "position_hint": "centered across the forward wall above the control console",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "port-side window",
            "category": "opening",
            "position_hint": "forward half of the port wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "starboard-side window",
            "category": "opening",
            "position_hint": "forward half of the starboard wall beside the helm",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "aft deck doorway",
            "category": "opening",
            "position_hint": "center of the aft wall, opening toward the threshold zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 10,
            "label": "temporary helm blockage",
            "category": "prop",
            "position_hint": "in the standing clearance directly behind the helm wheel",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 11,
            "label": "old printed photograph",
            "category": "prop",
            "position_hint": "temporarily held within the central standing zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "subjective circular distortion",
            "category": "prop",
            "position_hint": "subjective visual field across the helm, instruments, and windows",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "subjective red circle",
            "category": "prop",
            "position_hint": "newly perceived near the forward control area, with no permanent surface mark",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "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)"
        ]
      },
      "L21B03": {
        "bg_id": "L21B03",
        "fp_id": "fp_l21_wheelhouse",
        "use_numbered_elements": [
          1,
          2,
          4,
          5,
          6,
          7,
          8,
          11
        ],
        "ignore_numbered_elements": [
          10,
          12,
          13
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "forward control zone",
            "category": "area",
            "position_hint": "forward end of wheelhouse beneath the forward windows",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "central standing zone",
            "category": "area",
            "position_hint": "center of wheelhouse between the console and aft doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "helm wheel",
            "category": "furniture",
            "position_hint": "starboard-forward side of the control console",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "marine control console",
            "category": "furniture",
            "position_hint": "across the forward wall below the window bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "forward window bank",
            "category": "opening",
            "position_hint": "centered across the forward wall above the control console",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "port-side window",
            "category": "opening",
            "position_hint": "forward half of the port wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "starboard-side window",
            "category": "opening",
            "position_hint": "forward half of the starboard wall beside the helm",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 11,
            "label": "old printed photograph",
            "category": "prop",
            "position_hint": "temporarily held within the central standing zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 10,
            "label": "temporary helm blockage",
            "category": "prop",
            "position_hint": "in the standing clearance directly behind the helm wheel",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "subjective circular distortion",
            "category": "prop",
            "position_hint": "subjective visual field across the helm, instruments, and windows",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "subjective red circle",
            "category": "prop",
            "position_hint": "newly perceived near the forward control area, with no permanent surface mark",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "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)"
        ]
      },
      "L21B02": {
        "bg_id": "L21B02",
        "fp_id": "fp_l21_wheelhouse",
        "use_numbered_elements": [
          1,
          2,
          4,
          5,
          6,
          7,
          8,
          12,
          13
        ],
        "ignore_numbered_elements": [
          10,
          11
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "forward control zone",
            "category": "area",
            "position_hint": "forward end of wheelhouse beneath the forward windows",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "central standing zone",
            "category": "area",
            "position_hint": "center of wheelhouse between the console and aft doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "helm wheel",
            "category": "furniture",
            "position_hint": "starboard-forward side of the control console",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "marine control console",
            "category": "furniture",
            "position_hint": "across the forward wall below the window bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "forward window bank",
            "category": "opening",
            "position_hint": "centered across the forward wall above the control console",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "port-side window",
            "category": "opening",
            "position_hint": "forward half of the port wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "starboard-side window",
            "category": "opening",
            "position_hint": "forward half of the starboard wall beside the helm",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "subjective circular distortion",
            "category": "prop",
            "position_hint": "subjective visual field across the helm, instruments, and windows",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "subjective red circle",
            "category": "prop",
            "position_hint": "newly perceived near the forward control area, with no permanent surface mark",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 10,
            "label": "temporary helm blockage",
            "category": "prop",
            "position_hint": "in the standing clearance directly behind the helm wheel",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "old printed photograph",
            "category": "prop",
            "position_hint": "temporarily held within the central standing zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "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)"
        ]
      }
    }
  },
  "step_id": "floor_plan_overlay_payload",
  "run_id": "ab7bfe91-696b-499e-9627-3ab3bf92bdde",
  "resolved_model": "gpt",
  "updated_at": "2026-07-16T21:55:25.283096+00:00",
  "project_config_snapshot": {}
}