What is {educated at} of {Sergei Diaghilev} that is {start time} is {1890-8-1} ?
What school did Sergei Diaghilev attend beginning 1890-8-1?
What education does Sergei Diaghilev have that begins at 1890-8-1?
SELECT ?n WHERE { resource:Sergei_Diaghilev property:educated_at ?i . ?i property:start_time ?l . FILTER ( CONTAINS ( YEAR ( ?l ) , '1890' ) ) . ?i property:educated_at ?n }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q211513> .
?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> <1890-8-1>
} 

SELECT ?obj WHERE { wd:Q211513 p:P69 ?s . ?s ps:P69 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1890')) }