{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-del-valle-volatile-alerts",
        "evidence_ids": [
          "evidence-del-valle-volatile-alerts"
        ],
        "predicate": "pretrip_alert_topics",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": null,
        "value": [
          "fire_danger",
          "blue_green_algae",
          "flood_closure"
        ]
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-volatile-alerts",
          "evidence_id": "evidence-del-valle-volatile-alerts",
          "notes": "",
          "observation_id": "observation-del-valle-volatile-alerts",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The page directs visitors to check current fire-danger restrictions and blue-green algae updates before travel, and warns that flooding can cause site or park closure and reservation cancellation with email or phone notice.",
          "observation_id": "observation-del-valle-volatile-alerts",
          "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"
        }
      ],
      "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"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "park-del-valle-regional-park",
      "kind": "park",
      "name": "Del Valle Regional Park"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260920-del-valle-reserveamerica-foundation",
      "evidence_refs": [
        "evidence-del-valle-volatile-alerts"
      ],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/claims/claim-del-valle-volatile-alerts.json",
      "reason": "Establish the source-backed Del Valle foundation from the supplied ReserveAmerica overview.",
      "record_id": "claim-del-valle-volatile-alerts",
      "record_type": "claim",
      "summary": "Establish Del Valle park and family-campground knowledge from the ReserveAmerica overview while preserving inventory, permit, and operational-condition uncertainty."
    }
  ],
  "navigation": {
    "next_id": "claim-delta-de-anza-railroad-desrys-closure-2026",
    "position": 190,
    "previous_id": "claim-del-valle-tent-placement",
    "total": 3965
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "The page directs visitors to check current fire-danger restrictions and blue-green algae updates before travel, and warns that flooding can cause site or park closure and reservation cancellation with email or phone notice.",
      "observation_id": "observation-del-valle-volatile-alerts",
      "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"
    }
  ],
  "record": {
    "claim_id": "claim-del-valle-volatile-alerts",
    "evidence_ids": [
      "evidence-del-valle-volatile-alerts"
    ],
    "predicate": "pretrip_alert_topics",
    "spatial_scope_ids": [
      "scope-del-valle-park"
    ],
    "subject_id": "park-del-valle-regional-park",
    "temporal_scope": null,
    "value": [
      "fire_danger",
      "blue_green_algae",
      "flood_closure"
    ]
  },
  "record_type": "claim",
  "related_records": [],
  "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"
    }
  ]
}