Question: What position did Oleg of Novgorod, born in the year 900 AD hold?
Paraphrase: In 900 AD Oleg of Novforod held what position?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q6131983 p:P569 ?s . ?s ps:P569 ?x filter(contains(?x , '900-1-1')) . ?s pq:P31 ?value}