What is {educated at} of {Xi Jinping} that is {start time} is {1975-0-0} ?
Was Xi Jinping educated in 1975?
When was Xi Jinping educated in year 1975?
SELECT ?r WHERE { ?t property:educated_at ?r . resource:Xi_Jinping property:educated_at ?t . ?t property:start_time ?k . FILTER ( CONTAINS ( YEAR ( ?k ) , '1975' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q15031> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P69> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1975-0-0>
} 

SELECT ?obj WHERE { wd:Q15031 p:P69 ?s . ?s ps:P69 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1975')) }