{"date":"2009-02-24","became_true":[{"id":"clm_B0F4F425F06A","entity":"whatsapp","predicate":"founder","value":"Jan Koum","valid_from":null,"undated":true,"valid_to":null,"published":null,"recorded":"2026-10-27","status":"valid","assertable":true},{"id":"clm_CE4B35589DC4","entity":"whatsapp","predicate":"founder","value":"Brian Acton","valid_from":null,"undated":true,"valid_to":null,"published":null,"recorded":"2026-10-27","status":"valid","assertable":true},{"id":"clm_DC5CA7A0C7E2","entity":"whatsapp","predicate":"headquarters","value":"Menlo Park","valid_from":null,"undated":true,"valid_to":"2009-02-24","published":null,"recorded":"2026-10-27","status":"superseded","assertable":false,"why_not":"retracted"}],"stopped_being_true":[{"id":"clm_DC5CA7A0C7E2","entity":"whatsapp","predicate":"headquarters","value":"Menlo Park","valid_from":null,"undated":true,"valid_to":"2009-02-24","published":null,"recorded":"2026-10-27","status":"superseded","assertable":false,"why_not":"retracted"}],"recorded":[],"complete":true,"legend":{"dates":"valid_from: when the claim took effect (a period figure: the day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":{"retracted":"Retracted: found wrong. Kept on the record as history, never asserted."},"checked_by":{}}}