{
  "declared_links": {
    "economic_signal_ids": [],
    "relation": "topic-surface-only",
    "scan_signal_ids": []
  },
  "dek": "美國地質調查局（USGS）表示，這場災難的成因是一次冰川崩塌，但專家仍在調查洪水如何在下游發展並造成嚴重影響。",
  "desk": "politics",
  "event_id": "event-b8837a1afcdf9fdf51a61a07",
  "evidence_groups": [
    {
      "group_id": "bbc-chinese-editorial",
      "roles": [
        "media"
      ],
      "source_ids": [
        "bbc-chinese"
      ]
    }
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  "evidence_refs": [
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      "independence_group": "bbc-chinese-editorial",
      "item_id": "item-80fb8801870bf0869460e273",
      "published_at": "2026-08-27T16:52:46Z",
      "role": "media",
      "source_id": "bbc-chinese",
      "source_name": "BBC News Chinese",
      "title": "科學家分析尼泊爾—西藏致命山洪的來龍去脈",
      "url": "https://www.bbc.com/zhongwen/articles/ckgxvnv51x5o/trad?at_campaign=rss&at_medium=RSS",
      "version_id": "itemv-9be6de39f53065f659da0086"
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  "evidence_strength": "single-source",
  "headline": "科學家分析尼泊爾—西藏致命山洪的來龍去脈",
  "lead": false,
  "lead_reason": "All contributing source receipts are stale; the attributed dossier is retained but cannot lead.",
  "limitations": [
    "Palimpsest retained only feed title, canonical link, time, and a bounded plain-text excerpt; it did not fetch the article body.",
    "The evidence-strength label describes source structure, not truth, intent, impact, or causation.",
    "Declared instrument links are topical pointers until a separate scan or economic observation is joined by time and method.",
    "Title-similarity clustering can miss differently worded or cross-language accounts and can join closely worded updates.",
    "This dossier currently contains one independent evidence group and remains explicitly attributed."
  ],
  "mutation": {
    "kind": "new",
    "previous_version_id": null
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  "published_at": "2026-08-27T16:52:46Z",
  "reported_facts": [
    {
      "attribution": "BBC News Chinese",
      "evidence_item_id": "item-80fb8801870bf0869460e273",
      "published_at": "2026-08-27T16:52:46Z",
      "statement": "BBC News Chinese published “科學家分析尼泊爾—西藏致命山洪的來龍去脈”."
    }
  ],
  "topics": [
    "politics",
    "rights"
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  "updated_at": "2026-08-27T16:52:46Z",
  "url": "https://palimpsest.info/news/wire/event-b8837a1afcdf9fdf51a61a07/",
  "version_id": "eventv-8fef75e401bf6052708b4211"
}