{
  "answerability": "no_direct_claims_published",
  "claims": [],
  "entity": {
    "entity_id": "trailhead-hetch-hetchy",
    "kind": "trailhead",
    "name": "Hetch Hetchy Trailhead"
  },
  "gap_details": [],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260925-yosemite-hetch-hetchy-depth",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/entities/trailhead-hetch-hetchy.json",
      "reason": "Add reviewed Hetch Hetchy planning depth.",
      "record_id": "trailhead-hetch-hetchy",
      "record_type": "entity",
      "summary": "Add official-source Hetch Hetchy routes, access, reservoir rules, facilities, dated operational evidence, reviewed map points, and explicit gaps."
    }
  ],
  "journey": [],
  "knowledge_gaps": [],
  "reference_evidence": [],
  "relationships": [
    {
      "evidence_ids": [
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      ],
      "object_id": "route-hetch-hetchy-lookout-point",
      "predicate": "accesses",
      "relationship_id": "relationship-trailhead-hetch-hetchy-accesses-hetch-hetchy-lookout-point",
      "subject_id": "trailhead-hetch-hetchy",
      "temporal_scope": null
    },
    {
      "evidence_ids": [
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      ],
      "object_id": "trailhead-hetch-hetchy",
      "predicate": "starts_at",
      "relationship_id": "relationship-hetch-hetchy-lookout-point-starts-at",
      "subject_id": "route-hetch-hetchy-lookout-point",
      "temporal_scope": null
    }
  ],
  "route_geometry": null,
  "route_geometry_url": null,
  "type": "canonical_entity"
}