When did Katharine Hepburn marry Ludlow Ogden Smith and when did they divorce
SELECT ?value1 ?value2 WHERE { wd:Q56016 p:P26 ?s . ?s ps:P26 wd:Q22326909 . ?s pq:P580 ?value1 . ?s pq:P582 ?value2 }
katharine hepburn: Q56016 ludlow ogden smith: Q22326909