what is the {start time} for {Sergei Bondarchuk} has {spouse} as {Irina Skobtseva} ?
The year Sergei Bondarchuk marry Irina Skobtseva?
When did Sergei Bondarchuk marry Irina Skobtseva?
SELECT ?e WHERE { ?c property:start_time ?e . ?c property:spouse resource:Irina_Skobtseva . resource:Sergei_Bondarchuk property:spouse ?c }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q55190> .
?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/Q917581> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q55190 p:P26 ?s . ?s ps:P26 wd:Q917581 . ?s pq:P580 ?value}