{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-del-valle-brochure-activities-2025",
        "evidence_ids": [
          "evidence-del-valle-brochure-activities-2025"
        ],
        "predicate": "published_activity_profile",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": {
          "ends_on": "2025-12-31",
          "starts_on": "2025-01-01"
        },
        "value": [
          "camping",
          "boating",
          "fishing",
          "hiking",
          "horseback_riding",
          "picnicking",
          "swimming"
        ]
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-brochure-activities-2025",
          "evidence_id": "evidence-del-valle-brochure-activities-2025",
          "notes": "",
          "observation_id": "observation-ebrpd-brochure-2025-del-valle",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "PDF"
          ],
          "content": "The 2025 general brochure places Del Valle in the district system and identifies camping, boating, fishing, hiking, horseback riding, picnicking, and swimming as available activities.",
          "observation_id": "observation-ebrpd-brochure-2025-del-valle",
          "observed_at": "2025-01-01T00:00:00+00:00",
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-general-brochure-2025"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/sites/default/files/general-brochure-english.pdf",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-general-brochure-2025"
        }
      ]
    }
  ],
  "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-ebrpd-brochure-2025-del-valle.json",
      "reason": "Add the official EBRPD Del Valle campground corpus, preserving dated conflicts and live recheck boundaries.",
      "record_id": "observation-ebrpd-brochure-2025-del-valle",
      "record_type": "observation",
      "summary": "Ingest eight official EBRPD campground sources with current, dated, conflicting, and volatile evidence kept distinct."
    }
  ],
  "navigation": {
    "next_id": "observation-ebrpd-brooks-island-visitor-profile",
    "position": 66,
    "previous_id": "observation-ebrpd-briones-visitor-profile",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [
        "PDF"
      ],
      "content": "The 2025 general brochure places Del Valle in the district system and identifies camping, boating, fishing, hiking, horseback riding, picnicking, and swimming as available activities.",
      "observation_id": "observation-ebrpd-brochure-2025-del-valle",
      "observed_at": "2025-01-01T00:00:00+00:00",
      "observer": "Wayproof source review",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-general-brochure-2025"
    }
  ],
  "record": {
    "artifact_refs": [
      "PDF"
    ],
    "content": "The 2025 general brochure places Del Valle in the district system and identifies camping, boating, fishing, hiking, horseback riding, picnicking, and swimming as available activities.",
    "observation_id": "observation-ebrpd-brochure-2025-del-valle",
    "observed_at": "2025-01-01T00:00:00+00:00",
    "observer": "Wayproof source review",
    "retrieved_at": "2026-09-20T00:00:00+00:00",
    "source_id": "source-ebrpd-general-brochure-2025"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/sites/default/files/general-brochure-english.pdf",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-general-brochure-2025"
    }
  ]
}