{
  "declared_links": {
    "economic_signal_ids": [],
    "relation": "topic-surface-only",
    "scan_signal_ids": []
  },
  "dek": "Climate change and agricultural development have brought a new goose population to China with unique migratory patterns, a study has found. In an article on the Chinese Academy of Sciences website, researchers from the CAS Institute of Zoology said they had discovered a “genetically distinct” population of swan geese t",
  "desk": "politics",
  "event_id": "event-4f9c5a8a0c5e6d4b570f2d1a",
  "evidence_groups": [
    {
      "group_id": "south-china-morning-post-editorial",
      "roles": [
        "media"
      ],
      "source_ids": [
        "scmp-china"
      ]
    }
  ],
  "evidence_refs": [
    {
      "independence_group": "south-china-morning-post-editorial",
      "item_id": "item-9e45e1f524bf8533e008912b",
      "published_at": "2026-10-07T04:00:05Z",
      "role": "media",
      "source_id": "scmp-china",
      "source_name": "South China Morning Post — China",
      "title": "Climate change and farming gave rise to ‘genetically distinct’ Beijing swan goose: study",
      "url": "https://www.scmp.com/news/china/science/article/3369863/climate-change-and-farming-gave-rise-genetically-distinct-beijing-swan-goose-study",
      "version_id": "itemv-35e2f32da4aa252912d882f0"
    }
  ],
  "evidence_strength": "single-source",
  "headline": "Climate change and farming gave rise to ‘genetically distinct’ Beijing swan goose: study",
  "lead": false,
  "lead_reason": "Current single-source metadata is retained but not promoted as a 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": "unchanged",
    "previous_version_id": "eventv-e55e864445f8d101ecfa86b0"
  },
  "published_at": "2026-10-07T04:00:05Z",
  "reported_facts": [
    {
      "attribution": "South China Morning Post — China",
      "evidence_item_id": "item-9e45e1f524bf8533e008912b",
      "published_at": "2026-10-07T04:00:05Z",
      "statement": "South China Morning Post — China published “Climate change and farming gave rise to ‘genetically distinct’ Beijing swan goose: study”."
    }
  ],
  "topics": [
    "measurement",
    "politics"
  ],
  "updated_at": "2026-10-07T04:00:05Z",
  "url": "https://palimpsest.info/news/wire/event-4f9c5a8a0c5e6d4b570f2d1a/",
  "version_id": "eventv-e55e864445f8d101ecfa86b0"
}