what is the {start time} for {Kelsey Grammer} has {spouse} as {Camille Grammer} ?
When did Kelsey Grammer and Camille Grammer marry?
When did Kelsey Grammer become the spouse of Camille Grammer?
SELECT ?n WHERE { ?b property:spouse resource:Camille_Grammer . resource:Kelsey_Grammer property:spouse ?b . ?b property:start_time ?n }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q196560> .
?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/Q2034653> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q196560 p:P26 ?s . ?s ps:P26 wd:Q2034653 . ?s pq:P580 ?value}