Contribution seq 25484

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "bianfu_primary_20260929",
      "title": "Ancient proteins identify various Denisovan remains from Southwest China",
      "publisher": "Nature",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T06:03:00Z",
      "canonical_uri": "https://www.nature.com/articles/s41586-026-10976-9",
      "publication_date": "2026-09-09"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "bianfu_screening",
      "excerpt": "To identify further hominin long bones, we morphologically screened more than 60,000 bone fragments from Bianfu Cave in Southwest China, of which 76 were selected for zooarchaeology by mass spectrometry and 17 for proteomic sequencing analysis.",
      "locator": {},
      "source_id": "bianfu_primary_20260929",
      "excerpt_hash": "sha256:304bcd17849afd10aff1812c08d0bae54d783ccefa8dad63dfff6a4f809e8d02",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "bianfu_remains",
      "excerpt": "These analyses identified three hominin fossils, comprising two parietal bone fragments and one proximal radial fragment, from layers dated to approximately 167–134 thousand years ago. Subsequent proteomic analysis confirmed the taxonomic affiliation of these newly identified hominin bones, as well as that of two hominin teeth discovered during the excavation, as Denisovan.",
      "locator": {},
      "source_id": "bianfu_primary_20260929",
      "excerpt_hash": "sha256:e0561a6744b077714cf01a451aa8949dc1d582e9a772cc9c9ba1ed6c040ab508",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "bianfu_dna",
      "excerpt": "An attempt to recover endogenous ancient DNA from these three hominin samples failed.",
      "locator": {},
      "source_id": "bianfu_primary_20260929",
      "excerpt_hash": "sha256:921c478d60eb305c9535eef2ea2bb00762569837c5ef5b28ade19219fe1d7bff",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "bianfu_comparison",
      "excerpt": "These findings establish Bianfu Cave as a Denisovan locality yielding the most abundant remains of this hominin group outside Denisova Cave in Siberia.",
      "locator": {},
      "source_id": "bianfu_primary_20260929",
      "excerpt_hash": "sha256:6ced1c3a46a6ecbfd7ec1617deefe2ae2c185199664eef9b58ae9a31151afd0e",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_CLAIM",
      "ref": "bianfu_scope_qualifier",
      "claim_type": "HISTORICAL",
      "qualifiers": {},
      "canonical_text": "The 2026 report screened more than 60,000 Bianfu Cave bone fragments, selected 76 for ZooMS and 17 for proteomics, and identified three Denisovan bone fragments from layers dated approximately 167–134 thousand years ago; proteomics also confirmed two excavated teeth as Denisovan, whereas endogenous ancient-DNA recovery from the three bones failed.",
      "affirms_not_private_individual": true
    },
    {
      "op": "CREATE_CLAIM_EDGE",
      "to_claim_id": "409b707a-cf08-84fa-8a69-756586e78bd6",
      "from_claim_id": "bianfu_scope_qualifier",
      "relationship_type": "NARROWS"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "ev_bianfu_screening",
      "statement": "The study screened over 60,000 fragments and selected 76 for ZooMS and 17 for proteomic sequencing.",
      "observation_type": "ARCHAEOLOGICAL",
      "source_location_id": "bianfu_screening"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "ev_bianfu_remains",
      "statement": "Three bone fossils from approximately 167–134 ka plus two teeth were confirmed Denisovan by proteomic analysis.",
      "observation_type": "ARCHAEOLOGICAL",
      "source_location_id": "bianfu_remains"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "ev_bianfu_dna",
      "statement": "Ancient-DNA recovery failed for the three newly identified hominin bone samples.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "bianfu_dna"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "ev_bianfu_comparison",
      "statement": "The abundance comparison is explicitly relative to Denisova Cave in Siberia at the report date.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "bianfu_comparison"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Adds screening and selection denominators.",
      "claim_id": "409b707a-cf08-84fa-8a69-756586e78bd6",
      "direction": "QUALIFY",
      "evidence_item_id": "ev_bianfu_screening",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Specifies the count, types, layers, age range, and proteomic basis.",
      "claim_id": "409b707a-cf08-84fa-8a69-756586e78bd6",
      "direction": "QUALIFY",
      "evidence_item_id": "ev_bianfu_remains",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Clarifies that the three new bone identifications were not supported by recovered endogenous DNA.",
      "claim_id": "409b707a-cf08-84fa-8a69-756586e78bd6",
      "direction": "QUALIFY",
      "evidence_item_id": "ev_bianfu_dna",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Restates the comparison baseline and report-relative framing.",
      "claim_id": "409b707a-cf08-84fa-8a69-756586e78bd6",
      "direction": "QUALIFY",
      "evidence_item_id": "ev_bianfu_comparison",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    }
  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the full Nature article, including Abstract, excavation chronology, Further hominin bone identification, Species and population assignments, Discussion, and Methods. Checked the comparative-abundance wording, archaeological time range, number and type of remains, screening denominators, and whether identification used ancient DNA or proteins."
}

Rows created

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• EvidenceClaimLink 503888c1-c82d-863c-a9ed-aa20b78fbfd3 (accepted seq 25485)
• EvidenceClaimLink 6802b8db-1b94-85ac-a000-43e521173774 (accepted seq 25485)

Status history

Audits

None.

Audit sampling (audit-policy-v0.1): probability 1.0000, sampled yes; inputs {"n":"0.00","mean":"0.5000","domain":"history","task_type":"QUALIFIER_CHECK","principal_tier":"PSEUDONYMOUS","downstream_count":0,"outcome_is_unusual":false}