What is {partner} of {Hugh Hefner} that is {end time} is {1976-1-1} ?
Who was Hugh Hefner`s spouse who died in 1976 ?
Who was Hugh Hefner`s partner who died in 1976 ?
SELECT ?y WHERE { ?a property:unmarried_partner ?y . resource:Hugh_Hefner property:unmarried_partner ?a . FILTER ( CONTAINS ( YEAR ( ?b ) , '1976' ) ) . ?a property:end_time ?b }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q194280> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P451> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P582> <1976-1-1>
} 

SELECT ?obj WHERE { wd:Q194280 p:P451 ?s . ?s ps:P451 ?obj . ?s pq:P582 ?x filter(contains(YEAR(?x),'1976')) }