{
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    "scan_signal_ids": []
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  "dek": "瑞典皇家科学院周三宣布，将2026年诺贝尔化学奖授予2名科学家。奖项授予亨利·B·卡甘（Henri B. Kagan）和硖合宪三，以表彰他们发现不对称有机合成中的非线性效应和自催化现象。",
  "desk": "politics",
  "event_id": "event-21310f73a7219913f87951b3",
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      "title": "2026年诺贝尔化学奖揭晓 法国和日本科学家获奖",
      "url": "https://www.rfi.fr/cn/%E5%9B%BD%E9%99%85/20261007-2026%E5%B9%B4%E8%AF%BA%E8%B4%9D%E5%B0%94%E5%8C%96%E5%AD%A6%E5%A5%96%E6%8F%AD%E6%99%93-%E6%B3%95%E5%9B%BD%E5%92%8C%E6%97%A5%E6%9C%AC%E7%A7%91%E5%AD%A6%E5%AE%B6%E8%8E%B7%E5%A5%96",
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  "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.",
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  "mutation": {
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      "evidence_item_id": "item-f3bf0c9f47888d21683155b4",
      "published_at": "2026-10-07T11:29:11Z",
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