Alignment Research Center (ARC) — Founded Date: Apr 2021

NoteThe Wikidata source directly states the 'inception' field as 'April 2021', which matches the claimed founded date of 2021-04 (April 2021). The date formats are equivalent: '2021-04' is the ISO 8601 month-level representation of 'April 2021'. The source is about the same entity (Alignment Research Center) as the claim, and the founding date is explicitly documented with a reference to the English Wikipedia article.