what is the {start time} for {Mike Nichols} has {spouse} as {Diane Sawyer} ?
Mike Nichols and Diane Sawyer were married when?
When did Mike Nichols marry Diane Sawyer?
SELECT ?z WHERE { ?j property:start_time ?z . resource:Mike_Nichols property:spouse ?j . ?j property:spouse resource:Diane_Sawyer }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q51537> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P26> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q236402> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q51537 p:P26 ?s . ?s ps:P26 wd:Q236402 . ?s pq:P580 ?value}