What is {date of birth} of {Olga of Kiev} that is {sourcing circumstances} is {circa} ?
What is the date of birth of Olga of Kiev?
SELECT ?obj WHERE { wd:Q193198 p:P569 ?s . ?s ps:P569 ?obj . ?s pq:P1480 wd:Q5727902 }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q193198> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P569> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P1480> <http://wikidata.dbpedia.org/resource/Q5727902>
} 

On what date did Olga of Kiev come to this world?