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    {
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        "claim_id": "claim-staging-tilden-south-park-willows-access-profile",
        "evidence_ids": [
          "evidence-staging-tilden-south-park-willows-access-profile"
        ],
        "predicate": "access_profile",
        "spatial_scope_ids": [
          "scope-staging-tilden-south-park-willows"
        ],
        "subject_id": "staging-tilden-south-park-willows",
        "temporal_scope": null,
        "value": {
          "access_mode": "vehicle",
          "latitude": 37.8859575565969,
          "longitude": -122.230282892743,
          "provides_access_to": [
            "Willows Picnic Area",
            "hiking trailheads"
          ]
        }
      },
      "evidence": [
        {
          "claim_id": "claim-staging-tilden-south-park-willows-access-profile",
          "evidence_id": "evidence-staging-tilden-south-park-willows-access-profile",
          "notes": "Official Tilden access listing and linked map coordinate; destination mapping comes from the park's To Reach The Park guidance.",
          "observation_id": "observation-ebrpd-tilden-gps-coordinates-20260922",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "Attractions",
            "Other Important Points"
          ],
          "content": "The official Tilden GPS page publishes coordinates for attractions, camps, entrances, and other important points.",
          "observation_id": "observation-ebrpd-tilden-gps-coordinates-20260922",
          "observed_at": null,
          "observer": "Wayproof live source review",
          "retrieved_at": "2026-09-22T15:35:00+00:00",
          "source_id": "source-ebrpd-tilden-gps-coordinates"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/parks/tilden/gps-coordinates",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-tilden-gps-coordinates"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "entrance-tilden-es-anderson-walk-in",
      "kind": "entrance",
      "name": "Tilden ES Anderson Walk-In Entrance"
    },
    {
      "entity_id": "entrance-tilden-lake-anza-road",
      "kind": "entrance",
      "name": "Tilden Lake Anza Road Entrance"
    },
    {
      "entity_id": "entrance-tilden-lomas-cantadas",
      "kind": "entrance",
      "name": "Tilden Lomas Cantadas Road Entrance"
    },
    {
      "entity_id": "entrance-tilden-wildcat-canyon-walk-in",
      "kind": "entrance",
      "name": "Tilden Wildcat Canyon Road Walk-In Entrance"
    },
    {
      "entity_id": "staging-tilden-brazil-building",
      "kind": "staging_area",
      "name": "Tilden Brazil Building Staging Area"
    },
    {
      "entity_id": "staging-tilden-golf-course-drive",
      "kind": "staging_area",
      "name": "Tilden Golf Course Drive Staging Area"
    },
    {
      "entity_id": "staging-tilden-golf-course-entrance",
      "kind": "staging_area",
      "name": "Tilden Golf Course Entrance Staging Area"
    },
    {
      "entity_id": "staging-tilden-grizzly-peak-tower",
      "kind": "staging_area",
      "name": "Tilden Grizzly Peak Boulevard Staging Area at Tower Trail"
    },
    {
      "entity_id": "staging-tilden-inspiration-point",
      "kind": "staging_area",
      "name": "Tilden Inspiration Point Parking Lot"
    },
    {
      "entity_id": "staging-tilden-merry-go-round",
      "kind": "staging_area",
      "name": "Tilden Merry-Go-Round Staging Area"
    },
    {
      "entity_id": "staging-tilden-south-park-big-springs",
      "kind": "staging_area",
      "name": "Tilden South Park Drive Staging Area at Big Springs Trail"
    },
    {
      "entity_id": "staging-tilden-south-park-padre",
      "kind": "staging_area",
      "name": "Tilden South Park Drive Staging Area at Padre"
    },
    {
      "entity_id": "staging-tilden-south-park-willows",
      "kind": "staging_area",
      "name": "Tilden South Park Drive Staging Area at Willows"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260922-tilden-access-routes-conditions",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/sources/source-ebrpd-tilden-gps-coordinates.json",
      "reason": "Materialize official Tilden access, route, coordinate, or current-condition knowledge.",
      "record_id": "source-ebrpd-tilden-gps-coordinates",
      "record_type": "source",
      "summary": "Deepen Tilden access, route, geospatial, and current-condition knowledge."
    }
  ],
  "navigation": {
    "next_id": "source-ebrpd-tilden-nature-area-park-page",
    "position": 89,
    "previous_id": "source-ebrpd-thurgood-marshall-regional-park-home-port-chicago-50-park-page",
    "total": 587
  },
  "observations": [
    {
      "artifact_refs": [
        "Attractions",
        "Other Important Points"
      ],
      "content": "The official Tilden GPS page publishes coordinates for attractions, camps, entrances, and other important points.",
      "observation_id": "observation-ebrpd-tilden-gps-coordinates-20260922",
      "observed_at": null,
      "observer": "Wayproof live source review",
      "retrieved_at": "2026-09-22T15:35:00+00:00",
      "source_id": "source-ebrpd-tilden-gps-coordinates"
    }
  ],
  "record": {
    "locator": "https://www.ebparks.org/parks/tilden/gps-coordinates",
    "publisher": "East Bay Regional Park District",
    "source_id": "source-ebrpd-tilden-gps-coordinates"
  },
  "record_type": "source",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/parks/tilden/gps-coordinates",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-tilden-gps-coordinates"
    }
  ]
}