{"public_id":"cl_98d284d6a5b140586a06e6fd7b4ba128","status":"active","superseded_by_public_id":null,"corpus_id":46964162,"text":"Principal factor analysis suggested poultry feed as a possible major source of in-house PM2.5 and secondary inorganic and organic particulate matter as possible major sources of ambient PM2.5.","confidence":0.94,"paper":{"corpus_id":46964162,"title":"Organic and Elemental Carbon in Atmospheric Fine Particulate Matter in an Animal Agriculture Intensive Area in North Carolina: Estimation of Secondary Organic Carbon Concentrations","url":"https://sah.borca.ai/papers/46964162"},"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.94,"origin_kinds":["extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":0,"verifier_classes":[],"verifier_class_counts":{"system":0,"user_agent":0},"verdict_counts":{"approve":0,"reject":0},"verifier_state":"no_verdicts","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_36f2ba9fb58607349870434852984191","name":"secondary inorganic and organic particulate matter","description":"Atmospheric particulate matter formed through secondary chemical processes from inorganic and organic precursors.","types":["atmospheric component"],"url":"https://sah.borca.ai/concepts/co_36f2ba9fb58607349870434852984191"},{"public_id":"co_c3ccf39d7415eff1a61a9cc41eaba43d","name":"poultry feed","description":"Feed used in poultry production and identified here as a possible PM2.5 source.","types":["source"],"url":"https://sah.borca.ai/concepts/co_c3ccf39d7415eff1a61a9cc41eaba43d"},{"public_id":"co_ec940777b3d12932d993739b3731a6af","name":"principal factor analysis","description":"A multivariate statistical method used to infer likely sources from measured variables.","types":["statistical method"],"url":"https://sah.borca.ai/concepts/co_ec940777b3d12932d993739b3731a6af"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_98d284d6a5b140586a06e6fd7b4ba128"}