{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-tilden-camps-official",
        "evidence_ids": [
          "evidence-tilden-camps-official"
        ],
        "predicate": "site_inventory",
        "spatial_scope_ids": [
          "scope-charles-lee-tilden-regional-park"
        ],
        "subject_id": "park-charles-lee-tilden-regional-park",
        "temporal_scope": null,
        "value": {
          "common_group_facilities": {
            "barbecue": true,
            "chemical_toilets": true,
            "fire_ring": true,
            "picnic_tables": true
          },
          "equestrian_camp": {
            "horse_water_by_arrangement": true,
            "maximum_people": 50,
            "minimum_horses": 5,
            "minimum_people": 4,
            "potable_human_water": false,
            "site_id": "equestrian-camp-tilden-es-anderson"
          },
          "group_camps": [
            {
              "maximum_people": 50,
              "minimum_people": 17,
              "site_id": "group-camp-tilden-new-woodland"
            },
            {
              "maximum_people": 75,
              "minimum_people": 17,
              "site_id": "group-camp-tilden-wildcat-view"
            },
            {
              "maximum_people": 75,
              "minimum_people": 17,
              "site_id": "group-camp-tilden-gillespie"
            }
          ],
          "minimum_advance_business_days": 3,
          "reservation_channel": "phone"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-tilden-camps-official",
          "evidence_id": "evidence-tilden-camps-official",
          "notes": "The official park page directly publishes group and equestrian camp capacities, facilities, and booking requirements.",
          "observation_id": "observation-ebrpd-tilden-camping-20260922",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "Equestrian Camping",
            "Group Camping"
          ],
          "content": "Tilden has New Woodland (17-50), Wildcat View (17-75), and Gillespie (17-75) group camps with picnic tables, BBQ, fire ring, and chemical toilets; reservations are by phone at least three business days ahead. ES Anderson Equestrian Camp holds 4-50 people, requires at least five horses, has horse water by arrangement but no potable human water, and uses the same booking lead.",
          "observation_id": "observation-ebrpd-tilden-camping-20260922",
          "observed_at": null,
          "observer": "Wayproof web source review",
          "retrieved_at": "2026-09-22T00:00:00-07:00",
          "source_id": "source-ebrpd-tilden-park-page"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/parks/tilden",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-tilden-park-page"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "park-charles-lee-tilden-regional-park",
      "kind": "park",
      "name": "Charles Lee Tilden Regional Park"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260922-parks-deep-batch-05-tilden-sibley",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-ebrpd-tilden-camping-20260922.json",
      "reason": "Publish source-backed Tilden and Sibley camping knowledge through the existing canonical lifecycle.",
      "record_id": "observation-ebrpd-tilden-camping-20260922",
      "record_type": "observation",
      "summary": "Deepen Tilden and Sibley camping planning knowledge."
    }
  ],
  "navigation": {
    "next_id": "observation-ebrpd-tilden-gps-coordinates-20260922",
    "position": 168,
    "previous_id": "observation-ebrpd-tilden-access-conditions-20260922",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [
        "Equestrian Camping",
        "Group Camping"
      ],
      "content": "Tilden has New Woodland (17-50), Wildcat View (17-75), and Gillespie (17-75) group camps with picnic tables, BBQ, fire ring, and chemical toilets; reservations are by phone at least three business days ahead. ES Anderson Equestrian Camp holds 4-50 people, requires at least five horses, has horse water by arrangement but no potable human water, and uses the same booking lead.",
      "observation_id": "observation-ebrpd-tilden-camping-20260922",
      "observed_at": null,
      "observer": "Wayproof web source review",
      "retrieved_at": "2026-09-22T00:00:00-07:00",
      "source_id": "source-ebrpd-tilden-park-page"
    }
  ],
  "record": {
    "artifact_refs": [
      "Equestrian Camping",
      "Group Camping"
    ],
    "content": "Tilden has New Woodland (17-50), Wildcat View (17-75), and Gillespie (17-75) group camps with picnic tables, BBQ, fire ring, and chemical toilets; reservations are by phone at least three business days ahead. ES Anderson Equestrian Camp holds 4-50 people, requires at least five horses, has horse water by arrangement but no potable human water, and uses the same booking lead.",
    "observation_id": "observation-ebrpd-tilden-camping-20260922",
    "observed_at": null,
    "observer": "Wayproof web source review",
    "retrieved_at": "2026-09-22T00:00:00-07:00",
    "source_id": "source-ebrpd-tilden-park-page"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/parks/tilden",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-tilden-park-page"
    }
  ]
}