{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-del-valle-group-booking",
        "evidence_ids": [
          "evidence-del-valle-group-booking",
          "evidence-del-valle-camping-current-group-booking"
        ],
        "predicate": "group_camping_reservation",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": null,
        "value": {
          "channel": "phone",
          "minimum_advance_business_days": 3,
          "minimum_group_size": 17
        }
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-group-booking",
          "evidence_id": "evidence-del-valle-group-booking",
          "notes": "",
          "observation_id": "observation-del-valle-group-booking",
          "stance": "supports"
        },
        {
          "claim_id": "claim-del-valle-group-booking",
          "evidence_id": "evidence-del-valle-camping-current-group-booking",
          "notes": "",
          "observation_id": "observation-del-valle-camping-reservations",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Groups of 17 or more are directed to group campsites. Group campsites are available by phone reservation only and require at least three business days of advance notice; requirements may differ for reservations made less than seven days ahead.",
          "observation_id": "observation-del-valle-group-booking",
          "observed_at": null,
          "observer": "user-supplied page transcription",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-reserveamerica-del-valle-overview-110003"
        },
        {
          "artifact_refs": [],
          "content": "Camping requires a reservation. Family sites require at least two business days; group sites at least three. ADA and group reservations are phone-only. Family sites may also be booked online.",
          "observation_id": "observation-del-valle-camping-reservations",
          "observed_at": null,
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-camping"
        }
      ],
      "sources": [
        {
          "locator": "https://www.reserveamerica.com/explore/del-valle/EB/110003/overview",
          "publisher": "ReserveAmerica / East Bay Regional Park District",
          "source_id": "source-reserveamerica-del-valle-overview-110003"
        },
        {
          "locator": "https://www.ebparks.org/parks/del-valle/camping",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-camping"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "park-del-valle-regional-park",
      "kind": "park",
      "name": "Del Valle Regional Park"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260920-ebrpd-del-valle-campground-corpus",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-del-valle-camping-reservations.json",
      "reason": "Add the official EBRPD Del Valle campground corpus, preserving dated conflicts and live recheck boundaries.",
      "record_id": "observation-del-valle-camping-reservations",
      "record_type": "observation",
      "summary": "Ingest eight official EBRPD campground sources with current, dated, conflicting, and volatile evidence kept distinct."
    }
  ],
  "navigation": {
    "next_id": "observation-del-valle-dogs",
    "position": 12,
    "previous_id": "observation-del-valle-camping-inventory",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "Camping requires a reservation. Family sites require at least two business days; group sites at least three. ADA and group reservations are phone-only. Family sites may also be booked online.",
      "observation_id": "observation-del-valle-camping-reservations",
      "observed_at": null,
      "observer": "Wayproof source review",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-del-valle-camping"
    }
  ],
  "record": {
    "artifact_refs": [],
    "content": "Camping requires a reservation. Family sites require at least two business days; group sites at least three. ADA and group reservations are phone-only. Family sites may also be booked online.",
    "observation_id": "observation-del-valle-camping-reservations",
    "observed_at": null,
    "observer": "Wayproof source review",
    "retrieved_at": "2026-09-20T00:00:00+00:00",
    "source_id": "source-ebrpd-del-valle-camping"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/parks/del-valle/camping",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-del-valle-camping"
    }
  ]
}