{"entity":"langchain","id":"ent_langchain","name":"LangChain","wikidata":"Q117340550","page":"https://asof.is/record/langchain","as_of":null,"known_by":null,"since":null,"predicates":["founder"],"fact_pages":[{"predicate":"founder","page":"https://asof.is/record/langchain/founder","md":"https://asof.is/record/langchain/founder.md","json":"https://asof.is/v1/entities/langchain/founder"}],"coverage":{"entity":"langchain","name":"LangChain","kind":"product","sources":[{"source":"wikidata","item":"Q117340550","covers":"dated statements whose reference URL is the source: leadership, ownership, names, founding, headquarters; never financial figures"},{"source":"wikidata-products","covers":"products it makes, develops or publishes, as released claims, when the release date cites a reference URL; a rotating scan, a few dozen entities a run"}],"holds":{"claims":1,"open":1,"retracted":0,"first":null,"predicates":{"founder":{"claims":1,"open":1,"kind":"list"}}},"freshness":[{"origin":"wikidata","label":"Wikidata statements that cite a reference URL (wikidata_ingest.py)","claims":1,"last_added":"2026-11-01","last_checked":"2026-11-01","last_verified":null}],"gaps":["core facts: none public (leadership, ownership, names, financials, headquarters); unknown, not absent: a claim is published only once checked against its source","posts: no official feed speaks for it (pipeline/feeds.json primary_for); what it holds comes from Wikidata, filings and other publishers' feeds"],"group":[],"group_complete":true,"rule":"sources: what the pipeline reads for this entity, from its config (pipeline/entities.json, feeds.json, sec_companies.json, huggingface_authors.json). holds: its public claims by predicate; open is held today; kind fact is what entity_state answers by default, event is for timeline. freshness, per ingest (origin): last_added is the day it last put a new claim here (first_seen_at), last_checked the day one was last checked against its source (checked_on), last_verified the day reverify.py last confirmed one against Wikidata (value_json.verified_at). Only checked claims are public, so a fact missing here is unknown, not absent. gaps: what the record does not cover for this entity, so an empty answer is not read as news."},"claims":[{"id":"clm_E6309606C138","predicate":"founder","value":"Harrison Chase","valid_from":null,"undated":true,"valid_to":null,"published":null,"recorded":"2026-11-01","confidence":0.8,"status":"valid","assertable":true,"superseded_by":null,"sources":[{"url":"https://research.contrary.com/company/langchain","tier":"secondary","publisher":"research.contrary.com","published_at":null},{"url":"https://sequoiacap.com/founder/harrison-chase","tier":"secondary","publisher":"sequoiacap.com","published_at":null},{"url":"https://www.wikidata.org/wiki/Q117340550","tier":"secondary","publisher":"Wikidata","published_at":null}],"evidence":{"by":"page-read","on":"2026-11-01","quote":"LangChain was founded by Harrison Chase (CEO) and Ankush Gola (co-founder) in 2023.","url":"https://research.contrary.com/company/langchain"}}],"legend":{"dates":"valid_from: when the claim took effect (a period figure: the day its period closed). published: the earliest day a source on the record published it (a filing's filing date, a post's date; null when no source carries one). recorded: the day AsOf first held it. A figure can take effect weeks before it is published.","why_not":{},"checked_by":{"page-read":"its source page states the value and the date"}}}