{
  "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,
          11
        ],
        "ignore_numbered_elements": [
          12,
          13,
          14,
          15,
          16,
          17
        ],
        "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": "north-central portion of the rooftop deck",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "iron entry door",
            "category": "opening",
            "position_hint": "south-facing wall of the rooftop room, opening onto the deck",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "front window",
            "category": "opening",
            "position_hint": "south-facing wall of the rooftop room, beside the iron entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "side window",
            "category": "opening",
            "position_hint": "east wall of the rooftop room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "rooftop water tank",
            "category": "prop",
            "position_hint": "northwest corner of the roof on the service pad",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "perimeter parapet",
            "category": "area",
            "position_hint": "continuous low boundary around the outer roof edge",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "stair arrival landing",
            "category": "area",
            "position_hint": "southwest edge of the rooftop deck, connected to stairs from lower storeys",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "fixed clothesline",
            "category": "prop",
            "position_hint": "open deck between the water tank service area and drying platform",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "low drying platform",
            "category": "furniture",
            "position_hint": "west side of the deck near the clothesline",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "water tank service pad",
            "category": "area",
            "position_hint": "northwest deck area beneath and around the water tank",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [],
        "ignored_state_overlay_markers": [
          {
            "number": 12,
            "label": "flyer lodged in door gap",
            "category": "prop",
            "position_hint": "at the gap along the iron entry door",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "windblown dried leaves",
            "category": "prop",
            "position_hint": "on and around the drying platform and across the entry approach",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "concealed intruder position",
            "category": "prop",
            "position_hint": "directly outside the iron entry door",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "intruder long shadow",
            "category": "prop",
            "position_hint": "extending from the entry approach across the rooftop deck",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "slightly forced-open door state",
            "category": "opening",
            "position_hint": "at the iron entry after the lock is bypassed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "attack silhouette in window",
            "category": "prop",
            "position_hint": "visible only within the surface of the front 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,
          7,
          8,
          11
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 7, 8, 11]); 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,
          6,
          7,
          9,
          10,
          12,
          13,
          14,
          15,
          16,
          17
        ],
        "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": "north-central portion of the rooftop deck",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "iron entry door",
            "category": "opening",
            "position_hint": "south-facing wall of the rooftop room, opening onto the deck",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "front window",
            "category": "opening",
            "position_hint": "south-facing wall of the rooftop room, beside the iron entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "rooftop water tank",
            "category": "prop",
            "position_hint": "northwest corner of the roof on the service pad",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "perimeter parapet",
            "category": "area",
            "position_hint": "continuous low boundary around the outer roof edge",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "fixed clothesline",
            "category": "prop",
            "position_hint": "open deck between the water tank service area and drying platform",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "low drying platform",
            "category": "furniture",
            "position_hint": "west side of the deck near the clothesline",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "flyer lodged in door gap",
            "category": "prop",
            "position_hint": "at the gap along the iron entry door",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "windblown dried leaves",
            "category": "prop",
            "position_hint": "on and around the drying platform and across the entry approach",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "concealed intruder position",
            "category": "prop",
            "position_hint": "directly outside the iron entry door",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "intruder long shadow",
            "category": "prop",
            "position_hint": "extending from the entry approach across the rooftop deck",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "slightly forced-open door state",
            "category": "opening",
            "position_hint": "at the iron entry after the lock is bypassed",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "attack silhouette in window",
            "category": "prop",
            "position_hint": "visible only within the surface of the front 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,
          7
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 7]); 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,
          5,
          6,
          7,
          11,
          13,
          14,
          15,
          16,
          23,
          38
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          31,
          32,
          33,
          34,
          35,
          36,
          37
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "living and dining area",
            "category": "area",
            "position_hint": "central and north-west portion of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "kitchenette",
            "category": "area",
            "position_hint": "north-west edge of living and dining area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entry threshold",
            "category": "area",
            "position_hint": "south-central threshold inside steel entrance",
            "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 opening into entry threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "small living window",
            "category": "opening",
            "position_hint": "north wall of living and dining area beside kitchenette",
            "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": "north wall of kitchenette beneath or beside living window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "compact stovetop",
            "category": "furniture",
            "position_hint": "north wall kitchenette counter beside sink",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "television stand",
            "category": "furniture",
            "position_hint": "west wall of living and dining area facing table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dining table and chairs",
            "category": "furniture",
            "position_hint": "center of living and dining area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "living floor lamp",
            "category": "furniture",
            "position_hint": "living area near daughter bedroom doorway",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 38,
            "label": "unfinished herbs and simmering pot",
            "category": "prop",
            "position_hint": "at kitchen sink and stovetop during ordinary daytime routine; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "blood pool and spatters",
            "category": "prop",
            "position_hint": "daughter bedroom floor beside bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprints to curtain",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading from blood pool to window curtain; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "body behind curtain",
            "category": "prop",
            "position_hint": "behind curtain at east side of daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "red circle above daughter bed",
            "category": "prop",
            "position_hint": "daughter bedroom wall above bed during violent night state; do not draw on base plan",
            "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 dining table during violent night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing bathroom red circle",
            "category": "prop",
            "position_hint": "bathroom wall visible through mirror or direct view; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face in family photograph",
            "category": "prop",
            "position_hint": "photograph on dining table during subjective morning vision; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "dusk red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or near bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "bloodstained old photograph pinned in circle",
            "category": "prop",
            "position_hint": "center of dusk red circle in daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "search footprints",
            "category": "prop",
            "position_hint": "entry and living floor continuing through the dwelling; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "searched furnishings and toppled chairs",
            "category": "furniture",
            "position_hint": "living and dining area around dining table; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "living window left open",
            "category": "opening",
            "position_hint": "state change at small living window; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 36,
            "label": "entrance door ajar and rattling",
            "category": "opening",
            "position_hint": "state change at south steel entrance door; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 37,
            "label": "shifted backpack and doll",
            "category": "prop",
            "position_hint": "daughter bedroom in restored night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          5,
          6
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 5, 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,
          12,
          15,
          16,
          18,
          22,
          23,
          24,
          25,
          26,
          27,
          28
        ],
        "ignore_numbered_elements": [
          29,
          30,
          31,
          32,
          33,
          34,
          35,
          36,
          37,
          38
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "living and dining area",
            "category": "area",
            "position_hint": "central and north-west 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": "south-east enclosed private room",
            "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 living area near entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "daughter bedroom window",
            "category": "opening",
            "position_hint": "east exterior wall of daughter bedroom",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "television stand",
            "category": "furniture",
            "position_hint": "west wall of living and dining area facing table",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dining table and chairs",
            "category": "furniture",
            "position_hint": "center of living and dining area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "daughter bed",
            "category": "furniture",
            "position_hint": "against north wall of daughter bedroom",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "daughter window curtain",
            "category": "prop",
            "position_hint": "inside daughter bedroom across east window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "living floor lamp",
            "category": "furniture",
            "position_hint": "living area near daughter bedroom doorway",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 24,
            "label": "blood pool and spatters",
            "category": "prop",
            "position_hint": "daughter bedroom floor beside bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprints to curtain",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading from blood pool to window curtain; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "body behind curtain",
            "category": "prop",
            "position_hint": "behind curtain at east side of daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "red circle above daughter bed",
            "category": "prop",
            "position_hint": "daughter bedroom wall above bed during violent night state; do not draw on base plan",
            "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 dining table during violent night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 29,
            "label": "vanishing bathroom red circle",
            "category": "prop",
            "position_hint": "bathroom wall visible through mirror or direct view; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face in family photograph",
            "category": "prop",
            "position_hint": "photograph on dining table during subjective morning vision; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "dusk red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or near bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "bloodstained old photograph pinned in circle",
            "category": "prop",
            "position_hint": "center of dusk red circle in daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "search footprints",
            "category": "prop",
            "position_hint": "entry and living floor continuing through the dwelling; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "searched furnishings and toppled chairs",
            "category": "furniture",
            "position_hint": "living and dining area around dining table; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "living window left open",
            "category": "opening",
            "position_hint": "state change at small living window; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 36,
            "label": "entrance door ajar and rattling",
            "category": "opening",
            "position_hint": "state change at south steel entrance door; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 37,
            "label": "shifted backpack and doll",
            "category": "prop",
            "position_hint": "daughter bedroom in restored night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 38,
            "label": "unfinished herbs and simmering pot",
            "category": "prop",
            "position_hint": "at kitchen sink and stovetop during ordinary daytime routine; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          3
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B07": {
        "bg_id": "L04B07",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          3,
          9,
          12,
          18,
          22,
          37
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          31,
          32,
          33,
          34,
          35,
          36,
          38
        ],
        "base_markers_to_reference": [
          {
            "number": 3,
            "label": "daughter bedroom",
            "category": "area",
            "position_hint": "south-east enclosed private room",
            "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 living area near entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "daughter bedroom window",
            "category": "opening",
            "position_hint": "east exterior wall of 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": "against north wall of daughter bedroom",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "daughter window curtain",
            "category": "prop",
            "position_hint": "inside daughter bedroom across east window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 37,
            "label": "shifted backpack and doll",
            "category": "prop",
            "position_hint": "daughter bedroom in restored night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "blood pool and spatters",
            "category": "prop",
            "position_hint": "daughter bedroom floor beside bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprints to curtain",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading from blood pool to window curtain; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "body behind curtain",
            "category": "prop",
            "position_hint": "behind curtain at east side of daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "red circle above daughter bed",
            "category": "prop",
            "position_hint": "daughter bedroom wall above bed during violent night state; do not draw on base plan",
            "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 dining table during violent night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing bathroom red circle",
            "category": "prop",
            "position_hint": "bathroom wall visible through mirror or direct view; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face in family photograph",
            "category": "prop",
            "position_hint": "photograph on dining table during subjective morning vision; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "dusk red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or near bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "bloodstained old photograph pinned in circle",
            "category": "prop",
            "position_hint": "center of dusk red circle in daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "search footprints",
            "category": "prop",
            "position_hint": "entry and living floor continuing through the dwelling; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "searched furnishings and toppled chairs",
            "category": "furniture",
            "position_hint": "living and dining area around dining table; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "living window left open",
            "category": "opening",
            "position_hint": "state change at small living window; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 36,
            "label": "entrance door ajar and rattling",
            "category": "opening",
            "position_hint": "state change at south steel entrance door; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 38,
            "label": "unfinished herbs and simmering pot",
            "category": "prop",
            "position_hint": "at kitchen sink and stovetop during ordinary daytime routine; do not draw on base plan",
            "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": []
      },
      "L04B05": {
        "bg_id": "L04B05",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          1,
          2,
          3,
          4,
          5,
          6,
          8,
          9,
          10,
          11,
          12,
          16,
          17,
          18,
          19,
          20,
          21,
          22,
          23
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          31,
          32,
          33,
          34,
          35,
          36,
          37,
          38
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "living and dining area",
            "category": "area",
            "position_hint": "central and north-west portion of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "mother bedroom",
            "category": "area",
            "position_hint": "north-east enclosed private room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "daughter bedroom",
            "category": "area",
            "position_hint": "south-east enclosed private room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "bathroom",
            "category": "area",
            "position_hint": "south-west enclosed service room near entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "kitchenette",
            "category": "area",
            "position_hint": "north-west edge of living and dining area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entry threshold",
            "category": "area",
            "position_hint": "south-central threshold inside steel entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "mother bedroom door",
            "category": "opening",
            "position_hint": "north-east side of living area",
            "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 living area near entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "bathroom door",
            "category": "opening",
            "position_hint": "south-west side of living area near entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "small living window",
            "category": "opening",
            "position_hint": "north wall of living and dining area beside kitchenette",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "daughter bedroom window",
            "category": "opening",
            "position_hint": "east exterior wall of daughter bedroom",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dining table and chairs",
            "category": "furniture",
            "position_hint": "center of living and dining area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 17,
            "label": "mother bed",
            "category": "furniture",
            "position_hint": "against north wall of mother bedroom",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "daughter bed",
            "category": "furniture",
            "position_hint": "against north wall of daughter bedroom",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "bathroom basin",
            "category": "furniture",
            "position_hint": "inside bathroom along north wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "toilet",
            "category": "furniture",
            "position_hint": "inside bathroom along west wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "shower drain area",
            "category": "furniture",
            "position_hint": "south-west corner of bathroom",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "daughter window curtain",
            "category": "prop",
            "position_hint": "inside daughter bedroom across east window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 23,
            "label": "living floor lamp",
            "category": "furniture",
            "position_hint": "living area near daughter bedroom doorway",
            "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": "blood pool and spatters",
            "category": "prop",
            "position_hint": "daughter bedroom floor beside bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprints to curtain",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading from blood pool to window curtain; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "body behind curtain",
            "category": "prop",
            "position_hint": "behind curtain at east side of daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "red circle above daughter bed",
            "category": "prop",
            "position_hint": "daughter bedroom wall above bed during violent night state; do not draw on base plan",
            "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 dining table during violent night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing bathroom red circle",
            "category": "prop",
            "position_hint": "bathroom wall visible through mirror or direct view; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face in family photograph",
            "category": "prop",
            "position_hint": "photograph on dining table during subjective morning vision; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "dusk red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or near bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "bloodstained old photograph pinned in circle",
            "category": "prop",
            "position_hint": "center of dusk red circle in daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "search footprints",
            "category": "prop",
            "position_hint": "entry and living floor continuing through the dwelling; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "searched furnishings and toppled chairs",
            "category": "furniture",
            "position_hint": "living and dining area around dining table; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "living window left open",
            "category": "opening",
            "position_hint": "state change at small living window; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 36,
            "label": "entrance door ajar and rattling",
            "category": "opening",
            "position_hint": "state change at south steel entrance door; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 37,
            "label": "shifted backpack and doll",
            "category": "prop",
            "position_hint": "daughter bedroom in restored night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 38,
            "label": "unfinished herbs and simmering pot",
            "category": "prop",
            "position_hint": "at kitchen sink and stovetop during ordinary daytime routine; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          4,
          5,
          6
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": true,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4, 5, 6]); 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,
          4,
          5,
          10,
          16,
          19,
          20,
          21,
          29,
          30
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          31,
          32,
          33,
          34,
          35,
          36,
          37,
          38
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "living and dining area",
            "category": "area",
            "position_hint": "central and north-west portion of the dwelling",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "bathroom",
            "category": "area",
            "position_hint": "south-west enclosed service room near entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "kitchenette",
            "category": "area",
            "position_hint": "north-west edge of living and dining area",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "bathroom door",
            "category": "opening",
            "position_hint": "south-west side of living area near entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dining table and chairs",
            "category": "furniture",
            "position_hint": "center of living and dining area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 19,
            "label": "bathroom basin",
            "category": "furniture",
            "position_hint": "inside bathroom along north wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 20,
            "label": "toilet",
            "category": "furniture",
            "position_hint": "inside bathroom along west wall",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 21,
            "label": "shower drain area",
            "category": "furniture",
            "position_hint": "south-west corner of bathroom",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 29,
            "label": "vanishing bathroom red circle",
            "category": "prop",
            "position_hint": "bathroom wall visible through mirror or direct view; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face in family photograph",
            "category": "prop",
            "position_hint": "photograph on dining table during subjective morning vision; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "blood pool and spatters",
            "category": "prop",
            "position_hint": "daughter bedroom floor beside bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprints to curtain",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading from blood pool to window curtain; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "body behind curtain",
            "category": "prop",
            "position_hint": "behind curtain at east side of daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "red circle above daughter bed",
            "category": "prop",
            "position_hint": "daughter bedroom wall above bed during violent night state; do not draw on base plan",
            "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 dining table during violent night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "dusk red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or near bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "bloodstained old photograph pinned in circle",
            "category": "prop",
            "position_hint": "center of dusk red circle in daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 33,
            "label": "search footprints",
            "category": "prop",
            "position_hint": "entry and living floor continuing through the dwelling; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "searched furnishings and toppled chairs",
            "category": "furniture",
            "position_hint": "living and dining area around dining table; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "living window left open",
            "category": "opening",
            "position_hint": "state change at small living window; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 36,
            "label": "entrance door ajar and rattling",
            "category": "opening",
            "position_hint": "state change at south steel entrance door; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 37,
            "label": "shifted backpack and doll",
            "category": "prop",
            "position_hint": "daughter bedroom in restored night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 38,
            "label": "unfinished herbs and simmering pot",
            "category": "prop",
            "position_hint": "at kitchen sink and stovetop during ordinary daytime routine; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          4,
          5
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 4, 5]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L04B02": {
        "bg_id": "L04B02",
        "fp_id": "fp_l04_rooftop_room_interior",
        "use_numbered_elements": [
          3,
          9,
          12,
          18,
          22,
          31,
          32
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          37,
          38
        ],
        "base_markers_to_reference": [
          {
            "number": 3,
            "label": "daughter bedroom",
            "category": "area",
            "position_hint": "south-east enclosed private room",
            "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 living area near entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "daughter bedroom window",
            "category": "opening",
            "position_hint": "east exterior wall of 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": "against north wall of daughter bedroom",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "daughter window curtain",
            "category": "prop",
            "position_hint": "inside daughter bedroom across east window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 31,
            "label": "dusk red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or near bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "bloodstained old photograph pinned in circle",
            "category": "prop",
            "position_hint": "center of dusk red circle in daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "blood pool and spatters",
            "category": "prop",
            "position_hint": "daughter bedroom floor beside bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprints to curtain",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading from blood pool to window curtain; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "body behind curtain",
            "category": "prop",
            "position_hint": "behind curtain at east side of daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "red circle above daughter bed",
            "category": "prop",
            "position_hint": "daughter bedroom wall above bed during violent night state; do not draw on base plan",
            "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 dining table during violent night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing bathroom red circle",
            "category": "prop",
            "position_hint": "bathroom wall visible through mirror or direct view; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face in family photograph",
            "category": "prop",
            "position_hint": "photograph on dining table during subjective morning vision; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 37,
            "label": "shifted backpack and doll",
            "category": "prop",
            "position_hint": "daughter bedroom in restored night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 38,
            "label": "unfinished herbs and simmering pot",
            "category": "prop",
            "position_hint": "at kitchen sink and stovetop during ordinary daytime routine; do not draw on base plan",
            "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,
          9,
          11,
          12,
          16,
          18,
          22,
          33,
          34,
          35,
          36
        ],
        "ignore_numbered_elements": [
          24,
          25,
          26,
          27,
          28,
          29,
          30,
          31,
          32,
          37,
          38
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "living and dining area",
            "category": "area",
            "position_hint": "central and north-west 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": "south-east enclosed private room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "entry threshold",
            "category": "area",
            "position_hint": "south-central threshold inside steel entrance",
            "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 opening into entry threshold",
            "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 living area near entry",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "small living window",
            "category": "opening",
            "position_hint": "north wall of living and dining area beside kitchenette",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "daughter bedroom window",
            "category": "opening",
            "position_hint": "east exterior wall of daughter bedroom",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dining table and chairs",
            "category": "furniture",
            "position_hint": "center of living and dining area",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 18,
            "label": "daughter bed",
            "category": "furniture",
            "position_hint": "against north wall of daughter bedroom",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 22,
            "label": "daughter window curtain",
            "category": "prop",
            "position_hint": "inside daughter bedroom across east window",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 33,
            "label": "search footprints",
            "category": "prop",
            "position_hint": "entry and living floor continuing through the dwelling; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 34,
            "label": "searched furnishings and toppled chairs",
            "category": "furniture",
            "position_hint": "living and dining area around dining table; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 35,
            "label": "living window left open",
            "category": "opening",
            "position_hint": "state change at small living window; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 36,
            "label": "entrance door ajar and rattling",
            "category": "opening",
            "position_hint": "state change at south steel entrance door; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 24,
            "label": "blood pool and spatters",
            "category": "prop",
            "position_hint": "daughter bedroom floor beside bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 25,
            "label": "bloody footprints to curtain",
            "category": "prop",
            "position_hint": "daughter bedroom floor leading from blood pool to window curtain; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 26,
            "label": "body behind curtain",
            "category": "prop",
            "position_hint": "behind curtain at east side of daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 27,
            "label": "red circle above daughter bed",
            "category": "prop",
            "position_hint": "daughter bedroom wall above bed during violent night state; do not draw on base plan",
            "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 dining table during violent night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 29,
            "label": "vanishing bathroom red circle",
            "category": "prop",
            "position_hint": "bathroom wall visible through mirror or direct view; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 30,
            "label": "melting face in family photograph",
            "category": "prop",
            "position_hint": "photograph on dining table during subjective morning vision; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 31,
            "label": "dusk red circle on bedroom wall",
            "category": "prop",
            "position_hint": "daughter bedroom wall above or near bed; do not draw on base plan",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 32,
            "label": "bloodstained old photograph pinned in circle",
            "category": "prop",
            "position_hint": "center of dusk red circle in daughter bedroom; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 37,
            "label": "shifted backpack and doll",
            "category": "prop",
            "position_hint": "daughter bedroom in restored night state; do not draw on base plan",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 38,
            "label": "unfinished herbs and simmering pot",
            "category": "prop",
            "position_hint": "at kitchen sink and stovetop during ordinary daytime routine; do not draw on base plan",
            "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,
          12,
          13
        ],
        "ignore_numbered_elements": [
          14,
          15
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "courtyard shared zone",
            "category": "area",
            "position_hint": "central open area enclosed by the residence, stair, and perimeter wall",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "exterior stair zone",
            "category": "area",
            "position_hint": "along the east side of the courtyard, rising from the lower landing toward the roof",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "bicycle recess",
            "category": "area",
            "position_hint": "rear corner beside or partly beneath the lower stair flight",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "courtyard perimeter wall",
            "category": "area",
            "position_hint": "along the exposed south and west boundaries of the courtyard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "vehicle approach",
            "category": "area",
            "position_hint": "narrow threshold strip entering from the south edge toward the courtyard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "courtyard gate",
            "category": "opening",
            "position_hint": "south boundary where the vehicle approach passes through the perimeter wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "main residence footprint",
            "category": "area",
            "position_hint": "north side of the courtyard, adjoining the exterior stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "rooftop room",
            "category": "area",
            "position_hint": "small upper-roof structure reached by the exterior stair landing",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "rooftop metal entrance",
            "category": "opening",
            "position_hint": "at the top stair landing on the exterior face of the rooftop room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "rooftop room window",
            "category": "opening",
            "position_hint": "courtyard-facing wall of the rooftop room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "roughly parked bicycle",
            "category": "prop",
            "position_hint": "temporarily leaning in the rear bicycle recess near the lower stairs",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "arriving police vehicle",
            "category": "prop",
            "position_hint": "at the courtyard gate and vehicle approach during the night arrival",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 14,
            "label": "black cat on wall",
            "category": "prop",
            "position_hint": "on top of the courtyard wall during the dawn view",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "illuminated rooftop window",
            "category": "prop",
            "position_hint": "warm light visible through the rooftop room window at dawn",
            "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,
          7,
          8
        ],
        "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, 7, 8]); 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": [
          4,
          7,
          8,
          10,
          11,
          14,
          15
        ],
        "ignore_numbered_elements": [
          12,
          13
        ],
        "base_markers_to_reference": [
          {
            "number": 4,
            "label": "courtyard perimeter wall",
            "category": "area",
            "position_hint": "along the exposed south and west boundaries of the courtyard",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "main residence footprint",
            "category": "area",
            "position_hint": "north side of the courtyard, adjoining the exterior stair",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "rooftop room",
            "category": "area",
            "position_hint": "small upper-roof structure reached by the exterior stair landing",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "rooftop room window",
            "category": "opening",
            "position_hint": "courtyard-facing wall of the rooftop room",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "rooftop water tank",
            "category": "prop",
            "position_hint": "on the open roof beside and behind the rooftop room",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "black cat on wall",
            "category": "prop",
            "position_hint": "on top of the courtyard wall during the dawn view",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "illuminated rooftop window",
            "category": "prop",
            "position_hint": "warm light visible through the rooftop room window at dawn",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 12,
            "label": "roughly parked bicycle",
            "category": "prop",
            "position_hint": "temporarily leaning in the rear bicycle recess near the lower stairs",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "arriving police vehicle",
            "category": "prop",
            "position_hint": "at the courtyard gate and vehicle approach during the night arrival",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          4,
          7,
          8
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([4, 7, 8]); 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,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "Exterior stair run",
            "category": "area",
            "position_hint": "long narrow circulation strip ascending from the south edge along the west side",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "Intermediate turning landing",
            "category": "area",
            "position_hint": "midway along the switchback stair circulation",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "Rooftop arrival landing",
            "category": "area",
            "position_hint": "northwest rooftop edge at the head of the final stair flight",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "Rooftop utility terrace",
            "category": "area",
            "position_hint": "open rooftop area east of the arrival landing and around the rooftop room",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "Rooftop room structure",
            "category": "area",
            "position_hint": "east side of the rooftop terrace, adjoining the arrival landing",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "Entrance threshold",
            "category": "area",
            "position_hint": "west face of the rooftop room directly opposite the arrival landing",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "Iron entrance door",
            "category": "opening",
            "position_hint": "set into the west wall of the rooftop room at the entrance threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "Stair guardrail",
            "category": "prop",
            "position_hint": "continuous along the exposed outer edge of the stair flights and landings",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "Rooftop parapet",
            "category": "prop",
            "position_hint": "around the exposed perimeter of the rooftop utility terrace",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "Rooftop water tank",
            "category": "prop",
            "position_hint": "far side of the rooftop utility terrace, separated from the entrance path",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "Half-open door state",
            "category": "opening",
            "position_hint": "at the iron entrance door after the apparent intrusion; overlay only",
            "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,
          3,
          4,
          5,
          6,
          7
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 3, 4, 5, 6, 7]); 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": "monitoring service zone",
            "category": "area",
            "position_hint": "north side of the office around the CCTV workstation",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "shared viewing zone",
            "category": "area",
            "position_hint": "center and south-center 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": "threshold zone",
            "category": "area",
            "position_hint": "small strip inside the south-wall access door",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "access door",
            "category": "opening",
            "position_hint": "south wall near the southwest corner, swinging inward",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "CCTV desk",
            "category": "furniture",
            "position_hint": "against the north wall, facing the monitor bank",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "flat monitor bank",
            "category": "prop",
            "position_hint": "on or immediately above the north-wall CCTV desk",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "operator chair",
            "category": "furniture",
            "position_hint": "centered directly south of the CCTV desk",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "visitor chairs",
            "category": "furniture",
            "position_hint": "in the shared viewing zone behind and slightly beside 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 flat monitor bank",
            "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,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          15
        ],
        "ignore_numbered_elements": [
          12,
          13,
          14
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared office zone",
            "category": "area",
            "position_hint": "main central and northern portion of the 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": "southwest corner immediately inside the corridor entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "corridor entrance door",
            "category": "opening",
            "position_hint": "southwest wall, opening inward into the threshold zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "exterior window band",
            "category": "opening",
            "position_hint": "continuous opening centered along the north wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "primary investigator desk",
            "category": "furniture",
            "position_hint": "northwest workstation position below the exterior window band",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "duty investigator desk and monitor",
            "category": "furniture",
            "position_hint": "north-central workstation position adjacent to the primary desk",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "shared workstation cluster",
            "category": "furniture",
            "position_hint": "east-central office area, arranged as paired rectangular desks with monitors",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "central circulation aisle",
            "category": "area",
            "position_hint": "clear route running from the southwest entrance between the desks",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "coffee counter and machine",
            "category": "prop",
            "position_hint": "against the southeast wall within the 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": "prop",
            "position_hint": "along the west wall north of the entrance threshold",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "smartphone with contact number",
            "category": "prop",
            "position_hint": "temporarily presented near the duty investigator desk during night duty",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 12,
            "label": "report and request forms",
            "category": "prop",
            "position_hint": "temporarily placed on or held beside the duty investigator desk",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 13,
            "label": "enlarged crime photographs",
            "category": "prop",
            "position_hint": "scattered across the primary investigator desk during the deserted-office state",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "phone location result display",
            "category": "prop",
            "position_hint": "visible only within the duty investigator monitor during the tracking-result state",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          9
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 9]); 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
        ],
        "ignore_numbered_elements": [
          13,
          14,
          15
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared office zone",
            "category": "area",
            "position_hint": "main central and northern portion of the 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": "southwest corner immediately inside the corridor entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 3,
            "label": "coffee service zone",
            "category": "area",
            "position_hint": "southeast corner beside the circulation aisle",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "corridor entrance door",
            "category": "opening",
            "position_hint": "southwest wall, opening inward into the threshold zone",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "exterior window band",
            "category": "opening",
            "position_hint": "continuous opening centered along the north wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "primary investigator desk",
            "category": "furniture",
            "position_hint": "northwest workstation position below the exterior window band",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "duty investigator desk and monitor",
            "category": "furniture",
            "position_hint": "north-central workstation position adjacent to the primary desk",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "shared workstation cluster",
            "category": "furniture",
            "position_hint": "east-central office area, arranged as paired rectangular desks with monitors",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "central circulation aisle",
            "category": "area",
            "position_hint": "clear route running from the southwest entrance between the desks",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "coffee counter and machine",
            "category": "prop",
            "position_hint": "against the southeast wall within the 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": "prop",
            "position_hint": "along the west wall north of the entrance threshold",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 12,
            "label": "report and request forms",
            "category": "prop",
            "position_hint": "temporarily placed on or held beside the duty investigator desk",
            "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 the primary investigator desk during the deserted-office state",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "phone location result display",
            "category": "prop",
            "position_hint": "visible only within the duty investigator 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": "smartphone with contact number",
            "category": "prop",
            "position_hint": "temporarily presented near the duty investigator desk during night duty",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          2,
          3,
          9
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 9]); 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,
          5,
          6,
          7,
          8,
          9,
          13,
          14
        ],
        "ignore_numbered_elements": [
          12,
          15
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "shared office zone",
            "category": "area",
            "position_hint": "main central and northern portion of the office",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "exterior window band",
            "category": "opening",
            "position_hint": "continuous opening centered along the north wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "primary investigator desk",
            "category": "furniture",
            "position_hint": "northwest workstation position below the exterior window band",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "duty investigator desk and monitor",
            "category": "furniture",
            "position_hint": "north-central workstation position adjacent to the primary desk",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "shared workstation cluster",
            "category": "furniture",
            "position_hint": "east-central office area, arranged as paired rectangular desks with monitors",
            "base_layer_decision": "base_persistent_furniture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "central circulation aisle",
            "category": "area",
            "position_hint": "clear route running from the southwest entrance between the desks",
            "base_layer_decision": "base_structural_unit",
            "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 the primary investigator desk during the deserted-office state",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "phone location result display",
            "category": "prop",
            "position_hint": "visible only within the duty investigator monitor during the tracking-result state",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 12,
            "label": "report and request forms",
            "category": "prop",
            "position_hint": "temporarily placed on or held beside the duty investigator desk",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "smartphone with contact number",
            "category": "prop",
            "position_hint": "temporarily presented near the duty investigator desk during night duty",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "target_unit_marker_numbers": [
          1,
          9
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 9]); 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": [
          4,
          5,
          6,
          7,
          9,
          10,
          11,
          12,
          14,
          15,
          16
        ],
        "ignore_numbered_elements": [],
        "base_markers_to_reference": [
          {
            "number": 4,
            "label": "aft working deck",
            "category": "area",
            "position_hint": "south end of vessel behind the wheelhouse",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "wheelhouse",
            "category": "area",
            "position_hint": "center-south portion of vessel between forward and aft decks",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "cabin threshold",
            "category": "area",
            "position_hint": "south edge of wheelhouse adjoining the aft working deck",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "helm access door",
            "category": "opening",
            "position_hint": "south wall of wheelhouse opening onto the cabin threshold",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "port wheelhouse window",
            "category": "opening",
            "position_hint": "west wall of wheelhouse above the port passage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "starboard wheelhouse window",
            "category": "opening",
            "position_hint": "east wall of wheelhouse above the starboard passage",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "perimeter safety rail",
            "category": "prop",
            "position_hint": "continuous along exposed port, starboard, bow, and stern deck edges",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "helm console",
            "category": "furniture",
            "position_hint": "inside the wheelhouse near the forward window bank",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "stern mooring fittings",
            "category": "prop",
            "position_hint": "south corners of the aft working deck",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "old printed photograph",
            "category": "prop",
            "position_hint": "temporarily held or examined on the aft working deck",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "paper route map",
            "category": "prop",
            "position_hint": "temporarily handed across the aft working deck",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [],
        "target_unit_marker_numbers": [
          4,
          5,
          6
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([4, 5, 6]); 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,
          11,
          12,
          13
        ],
        "ignore_numbered_elements": [
          14,
          15,
          16
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "wheelhouse standing zone",
            "category": "area",
            "position_hint": "central interior between the aft entrance and forward helm",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "helm service zone",
            "category": "area",
            "position_hint": "forward interior spanning the helm and control console",
            "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": "inside the aft wall directly at the entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 4,
            "label": "exterior deck strip",
            "category": "area",
            "position_hint": "immediately outside the aft doorway",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "helm wheel",
            "category": "prop",
            "position_hint": "forward center, mounted to the control console",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "control console",
            "category": "prop",
            "position_hint": "against the forward wall below the windshields",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "center forward windshield",
            "category": "opening",
            "position_hint": "center of the forward wall above the helm",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "port forward windshield",
            "category": "opening",
            "position_hint": "forward wall to the left of the center windshield",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "starboard forward windshield",
            "category": "opening",
            "position_hint": "forward wall to the right of the center windshield",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "port side window",
            "category": "opening",
            "position_hint": "forward half of the port side wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "starboard side window",
            "category": "opening",
            "position_hint": "forward half of the starboard side wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "aft doorway",
            "category": "opening",
            "position_hint": "center of the aft wall connecting the wheelhouse to the deck",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 13,
            "label": "blocked helm access",
            "category": "prop",
            "position_hint": "temporary obstruction in the narrow space immediately 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": 14,
            "label": "old printed photograph",
            "category": "prop",
            "position_hint": "temporarily held or presented within the central standing zone",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "repeating circles and red circle",
            "category": "prop",
            "position_hint": "subjective overlay around circular helm instruments and the space beyond the standing figures",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dizziness distortion",
            "category": "prop",
            "position_hint": "subjective localized distortion across the wheelhouse field of 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
        ],
        "dominant_target_unit_marker_number": null,
        "clean_background_expected": false,
        "diagnostics": [
          "multiple base_structural_unit markers in use_numbered_elements ([1, 2, 3, 4]); dominant_target_unit_marker_number left empty (W19B-1 lock — no lexical disambiguation)"
        ]
      },
      "L21B03": {
        "bg_id": "L21B03",
        "fp_id": "fp_l21_wheelhouse",
        "use_numbered_elements": [
          1,
          2,
          3,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12,
          14
        ],
        "ignore_numbered_elements": [
          13,
          15,
          16
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "wheelhouse standing zone",
            "category": "area",
            "position_hint": "central interior between the aft entrance and forward helm",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "helm service zone",
            "category": "area",
            "position_hint": "forward interior spanning the helm and control console",
            "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": "inside the aft wall directly at the entrance",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "helm wheel",
            "category": "prop",
            "position_hint": "forward center, mounted to the control console",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "control console",
            "category": "prop",
            "position_hint": "against the forward wall below the windshields",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "center forward windshield",
            "category": "opening",
            "position_hint": "center of the forward wall above the helm",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "port forward windshield",
            "category": "opening",
            "position_hint": "forward wall to the left of the center windshield",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "starboard forward windshield",
            "category": "opening",
            "position_hint": "forward wall to the right of the center windshield",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "port side window",
            "category": "opening",
            "position_hint": "forward half of the port side wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "starboard side window",
            "category": "opening",
            "position_hint": "forward half of the starboard side wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 12,
            "label": "aft doorway",
            "category": "opening",
            "position_hint": "center of the aft wall connecting the wheelhouse to the deck",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 14,
            "label": "old printed photograph",
            "category": "prop",
            "position_hint": "temporarily held or presented 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": 13,
            "label": "blocked helm access",
            "category": "prop",
            "position_hint": "temporary obstruction in the narrow space immediately behind the helm wheel",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 15,
            "label": "repeating circles and red circle",
            "category": "prop",
            "position_hint": "subjective overlay around circular helm instruments and the space beyond the standing figures",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dizziness distortion",
            "category": "prop",
            "position_hint": "subjective localized distortion across the wheelhouse field of view",
            "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)"
        ]
      },
      "L21B02": {
        "bg_id": "L21B02",
        "fp_id": "fp_l21_wheelhouse",
        "use_numbered_elements": [
          1,
          2,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          15,
          16
        ],
        "ignore_numbered_elements": [
          13,
          14
        ],
        "base_markers_to_reference": [
          {
            "number": 1,
            "label": "wheelhouse standing zone",
            "category": "area",
            "position_hint": "central interior between the aft entrance and forward helm",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 2,
            "label": "helm service zone",
            "category": "area",
            "position_hint": "forward interior spanning the helm and control console",
            "base_layer_decision": "base_structural_unit",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 5,
            "label": "helm wheel",
            "category": "prop",
            "position_hint": "forward center, mounted to the control console",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 6,
            "label": "control console",
            "category": "prop",
            "position_hint": "against the forward wall below the windshields",
            "base_layer_decision": "base_persistent_fixture",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 7,
            "label": "center forward windshield",
            "category": "opening",
            "position_hint": "center of the forward wall above the helm",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 8,
            "label": "port forward windshield",
            "category": "opening",
            "position_hint": "forward wall to the left of the center windshield",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 9,
            "label": "starboard forward windshield",
            "category": "opening",
            "position_hint": "forward wall to the right of the center windshield",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 10,
            "label": "port side window",
            "category": "opening",
            "position_hint": "forward half of the port side wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 11,
            "label": "starboard side window",
            "category": "opening",
            "position_hint": "forward half of the starboard side wall",
            "base_layer_decision": "base_opening",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "transient_markers_to_describe": [
          {
            "number": 15,
            "label": "repeating circles and red circle",
            "category": "prop",
            "position_hint": "subjective overlay around circular helm instruments and the space beyond the standing figures",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 16,
            "label": "dizziness distortion",
            "category": "prop",
            "position_hint": "subjective localized distortion across the wheelhouse field of view",
            "base_layer_decision": "state_overlay_plot_cue",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          }
        ],
        "ignored_state_overlay_markers": [
          {
            "number": 13,
            "label": "blocked helm access",
            "category": "prop",
            "position_hint": "temporary obstruction in the narrow space immediately behind the helm wheel",
            "base_layer_decision": "state_overlay_transient_object",
            "render_role": "not_applicable",
            "top_down_legibility": "not_applicable"
          },
          {
            "number": 14,
            "label": "old printed photograph",
            "category": "prop",
            "position_hint": "temporarily held or presented 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": "9eec67e4-ce54-4ac7-ad81-69e2d1132bd5",
  "resolved_model": "gpt",
  "updated_at": "2026-07-16T17:15:28.279135+00:00",
  "project_config_snapshot": {}
}