Question: Who is the mother of Joseph Stalin and Yakov Dzhugashvili and when were they born?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q855 p:P40 ?s . ?s ps:P40 wd:Q163816 . ?s pq:P25 ?value1 . ?s pq:P569 ?value2 }