{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-briones-group-camps-official",
        "evidence_ids": [
          "evidence-briones-group-camps-official"
        ],
        "predicate": "site_inventory",
        "spatial_scope_ids": [
          "scope-briones-regional-park"
        ],
        "subject_id": "park-briones-regional-park",
        "temporal_scope": null,
        "value": {
          "common_facilities": {
            "barbecues": true,
            "chemical_toilets": true,
            "fire_ring": true,
            "picnic_tables": true
          },
          "group_camps": [
            "group-camp-briones-homestead-valley",
            "group-camp-briones-maud-whalen",
            "group-camp-briones-wee-ta-chi"
          ],
          "minimum_people": 17
        }
      },
      "evidence": [
        {
          "claim_id": "claim-briones-group-camps-official",
          "evidence_id": "evidence-briones-group-camps-official",
          "notes": "The official park page directly lists the three camps, common facilities, and capacity range.",
          "observation_id": "observation-ebrpd-briones-camping-20260922",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "Camping"
          ],
          "content": "The official Briones page lists three group camps with capacities from 50 to 300. Each has picnic tables, barbecues, a fire ring, and chemical toilets; group camps require at least 17 people.",
          "observation_id": "observation-ebrpd-briones-camping-20260922",
          "observed_at": null,
          "observer": "Wayproof web source review",
          "retrieved_at": "2026-09-22T00:00:00-07:00",
          "source_id": "source-ebrpd-briones-park-page"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/parks/briones",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-briones-park-page"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "park-briones-regional-park",
      "kind": "park",
      "name": "Briones Regional Park"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260922-parks-deep-batch-04-group-camps",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-ebrpd-briones-camping-20260922.json",
      "reason": "Publish source-backed Briones and Point Pinole group-camp knowledge through the existing canonical lifecycle.",
      "record_id": "observation-ebrpd-briones-camping-20260922",
      "record_type": "observation",
      "summary": "Deepen Briones and Point Pinole group-camp planning knowledge."
    }
  ],
  "navigation": {
    "next_id": "observation-ebrpd-briones-visitor-profile",
    "position": 64,
    "previous_id": "observation-ebrpd-black-diamond-visitor-profile",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [
        "Camping"
      ],
      "content": "The official Briones page lists three group camps with capacities from 50 to 300. Each has picnic tables, barbecues, a fire ring, and chemical toilets; group camps require at least 17 people.",
      "observation_id": "observation-ebrpd-briones-camping-20260922",
      "observed_at": null,
      "observer": "Wayproof web source review",
      "retrieved_at": "2026-09-22T00:00:00-07:00",
      "source_id": "source-ebrpd-briones-park-page"
    }
  ],
  "record": {
    "artifact_refs": [
      "Camping"
    ],
    "content": "The official Briones page lists three group camps with capacities from 50 to 300. Each has picnic tables, barbecues, a fire ring, and chemical toilets; group camps require at least 17 people.",
    "observation_id": "observation-ebrpd-briones-camping-20260922",
    "observed_at": null,
    "observer": "Wayproof web source review",
    "retrieved_at": "2026-09-22T00:00:00-07:00",
    "source_id": "source-ebrpd-briones-park-page"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/parks/briones",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-briones-park-page"
    }
  ]
}