{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-del-valle-ebrpd-entry-fees",
        "evidence_ids": [
          "evidence-del-valle-ebrpd-entry-fees"
        ],
        "predicate": "published_entry_fees",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": null,
        "value": {
          "arroyo_staging_parking_usd": 0,
          "bus_parking_usd": 25,
          "flat_entry_excludes": [
            "fishing_permit",
            "mussel_inspection"
          ],
          "flat_entry_includes": [
            "vehicle_parking",
            "trailer_parking",
            "boat_launch"
          ],
          "flat_entry_season": "April through Labor Day",
          "trailered_vehicle_parking_usd": 5,
          "vehicle_parking_usd": 5,
          "weekend_holiday_flat_entry_usd": 10
        }
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-ebrpd-entry-fees",
          "evidence_id": "evidence-del-valle-ebrpd-entry-fees",
          "notes": "",
          "observation_id": "observation-del-valle-ebrpd-fees",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The page lists $5 vehicle parking, $5 trailered-vehicle parking, $25 bus parking, and no parking fee at Arroyo staging. On weekends and holidays from April through Labor Day it lists a $10 flat entry fee including vehicle and trailer parking and boat launch, excluding fishing permits and mussel inspection.",
          "observation_id": "observation-del-valle-ebrpd-fees",
          "observed_at": null,
          "observer": "user-supplied page transcription",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-park-page"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/parks/del-valle",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-park-page"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-ebrpd-swimming-del-valle-parking-fee",
        "evidence_ids": [
          "evidence-ebrpd-swimming-del-valle-parking-fee"
        ],
        "predicate": "published_swimming_page_parking_fee_usd",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": null,
        "value": 10
      },
      "evidence": [
        {
          "claim_id": "claim-ebrpd-swimming-del-valle-parking-fee",
          "evidence_id": "evidence-ebrpd-swimming-del-valle-parking-fee",
          "notes": "",
          "observation_id": "observation-ebrpd-swimming-del-valle-fee",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The Del Valle swimming page displays a $10 parking fee without seasonal or vehicle-type detail.",
          "observation_id": "observation-ebrpd-swimming-del-valle-fee",
          "observed_at": null,
          "observer": "user-supplied page transcription",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-swimming"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/recreation/swimming/del-valle",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-swimming"
        }
      ]
    }
  ],
  "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-swimming",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/gaps/gap-del-valle-swimming-parking-fee.json",
      "reason": "Add district-wide and Del Valle-specific swimming evidence with explicit applicability.",
      "record_id": "gap-del-valle-swimming-parking-fee",
      "record_type": "gap",
      "summary": "Add two linked EBRPD swimming sources while keeping district registration rules separate from Del Valle-specific schedules, safety, fees, and current conditions."
    }
  ],
  "navigation": {
    "next_id": "gap-east-fork-elevation-conflict",
    "position": 23,
    "previous_id": "gap-del-valle-stoplight-meanings",
    "total": 299
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "The page lists $5 vehicle parking, $5 trailered-vehicle parking, $25 bus parking, and no parking fee at Arroyo staging. On weekends and holidays from April through Labor Day it lists a $10 flat entry fee including vehicle and trailer parking and boat launch, excluding fishing permits and mussel inspection.",
      "observation_id": "observation-del-valle-ebrpd-fees",
      "observed_at": null,
      "observer": "user-supplied page transcription",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-del-valle-park-page"
    },
    {
      "artifact_refs": [],
      "content": "The Del Valle swimming page displays a $10 parking fee without seasonal or vehicle-type detail.",
      "observation_id": "observation-ebrpd-swimming-del-valle-fee",
      "observed_at": null,
      "observer": "user-supplied page transcription",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-del-valle-swimming"
    }
  ],
  "record": {
    "gap_id": "gap-del-valle-swimming-parking-fee",
    "question": "When does the swimming page's $10 parking fee apply?",
    "reason": "The swimming page says $10, while the park page distinguishes $5 parking from a seasonal $10 flat entry fee.",
    "related_ids": [
      "claim-ebrpd-swimming-del-valle-parking-fee",
      "claim-del-valle-ebrpd-entry-fees"
    ]
  },
  "record_type": "gap",
  "related_records": [
    {
      "record": {
        "claim_id": "claim-ebrpd-swimming-del-valle-parking-fee",
        "evidence_ids": [
          "evidence-ebrpd-swimming-del-valle-parking-fee"
        ],
        "predicate": "published_swimming_page_parking_fee_usd",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": null,
        "value": 10
      },
      "record_id": "claim-ebrpd-swimming-del-valle-parking-fee",
      "record_type": "claim"
    },
    {
      "record": {
        "claim_id": "claim-del-valle-ebrpd-entry-fees",
        "evidence_ids": [
          "evidence-del-valle-ebrpd-entry-fees"
        ],
        "predicate": "published_entry_fees",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": null,
        "value": {
          "arroyo_staging_parking_usd": 0,
          "bus_parking_usd": 25,
          "flat_entry_excludes": [
            "fishing_permit",
            "mussel_inspection"
          ],
          "flat_entry_includes": [
            "vehicle_parking",
            "trailer_parking",
            "boat_launch"
          ],
          "flat_entry_season": "April through Labor Day",
          "trailered_vehicle_parking_usd": 5,
          "vehicle_parking_usd": 5,
          "weekend_holiday_flat_entry_usd": 10
        }
      },
      "record_id": "claim-del-valle-ebrpd-entry-fees",
      "record_type": "claim"
    }
  ],
  "sources": [
    {
      "locator": "https://www.ebparks.org/parks/del-valle",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-del-valle-park-page"
    },
    {
      "locator": "https://www.ebparks.org/recreation/swimming/del-valle",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-del-valle-swimming"
    }
  ]
}