what is the {start time} for {Vincent Price} has {spouse} as {Mary Grant Price} ?
In what year did Vincent Price marry Maty Grant Price?
When did Vincent Price marry Mary Grant Price?
SELECT ?o WHERE { ?a property:start_time ?o . resource:Vincent_Price property:spouse ?a . ?a property:spouse resource:Mary_Grant_Price }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q219640> .
?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/Q6779667> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q219640 p:P26 ?s . ?s ps:P26 wd:Q6779667 . ?s pq:P580 ?value}