When did the marriage between Marilyn Monroe and James Dougherty end?
SELECT ?value1 ?value2 WHERE { wd:Q4616 p:P26 ?s . ?s ps:P26 wd:Q946783 . ?s pq:P582 ?value1 . ?s pq:P2842 ?value2 }
marilyn monroe: Q4616 james dougherty: Q946783