What is {educated at} of {Nikolay Nekrasov} that is {start time} is {1839-0-0} ?
What did Nikolay Nekrasov graduate in in 1839?
What degree is achieved by Nikolay Nekrasov in 1839?
SELECT ?i WHERE { ?h property:educated_at ?i . FILTER ( CONTAINS ( YEAR ( ?i ) , '1839' ) ) . ?h property:start_time ?i . resource:Nikolay_Nekrasov property:educated_at ?h }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q208003> .
?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> <1839-0-0>
} 

SELECT ?obj WHERE { wd:Q208003 p:P69 ?s . ?s ps:P69 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1839')) }