Question: When did Rudolph Valentino marry Jean Acker and when did their marriage end?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q188692 p:P26 ?s . ?s ps:P26 wd:Q265422 . ?s pq:P580 ?value1 . ?s pq:P582 ?value2 }