Question: When did Saigon cease to be the capital city of French Indochina?
Paraphrase: When did Saigon stop being the capital city of French Indochina?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q185682 p:P36 ?s . ?s ps:P36 wd:Q396499 . ?s pq:P582 ?value}