What is {spouse} of {C. S. Lewis} that is {start time} is {1956-1-1} ?
1-1-1956 was the date on which C.S. Lewis was wed to whom?
Who did C.S. Lewis marry  on 1-1-1956?
SELECT ?u WHERE { FILTER ( CONTAINS ( YEAR ( ?x ) , '1956' ) ) . ?i property:spouse ?u . resource:C._S._Lewis property:spouse ?i . ?i property:start_time ?x }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q9204> .
?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> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1956-1-1>
} 

SELECT ?obj WHERE { wd:Q9204 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1956')) }