{
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    {
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          "evidence-yosemite-hetch-hetchy-hours"
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        "temporal_scope": null,
        "value": "Sunrise to sunset for day visitors; permitted backpackers are excepted."
      },
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          "notes": "",
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          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "NPS identifies Yosemite as a nearly 1,200-square-mile Sierra Nevada national park, open 24 hours every day; Hetch Hetchy is open only sunrise to sunset except for permitted backpackers.",
          "observation_id": "observation-nps-yosemite-basic-20260922",
          "observed_at": "2025-09-22T00:00:00+00:00",
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          "retrieved_at": "2026-09-22T18:00:00+00:00",
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        {
          "locator": "https://www.nps.gov/yose/planyourvisit/basicinfo.htm",
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      ]
    }
  ],
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    {
      "entity_id": "entrance-yosemite-hetch-hetchy",
      "kind": "entrance",
      "name": "Hetch Hetchy Entrance"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260922-yosemite-nps-foundation",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/claims/claim-yosemite-hetch-hetchy-hours.json",
      "reason": "Publish a source-backed Yosemite National Park planning foundation from current official NPS pages.",
      "record_id": "claim-yosemite-hetch-hetchy-hours",
      "record_type": "claim",
      "summary": "Add a source-backed Yosemite planning foundation with actionable wilderness requirements, current-condition rechecks, party-dependent fees, access, camping, and preserved uncertainty."
    }
  ],
  "navigation": {
    "next_id": "claim-yosemite-hetch-hetchy-nps-segment-15187",
    "position": 3808,
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    "total": 3965
  },
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    {
      "artifact_refs": [],
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      "observation_id": "observation-nps-yosemite-basic-20260922",
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    ],
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    "value": "Sunrise to sunset for day visitors; permitted backpackers are excepted."
  },
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    {
      "locator": "https://www.nps.gov/yose/planyourvisit/basicinfo.htm",
      "publisher": "National Park Service",
      "source_id": "source-nps-yosemite-basic"
    }
  ]
}