Which is the date of death and birth of Joseph Stalin who has as a child Yakov Dzhugashvili?
SELECT ?value1 ?value2 WHERE { wd:Q855 p:P40 ?s . ?s ps:P40 wd:Q163816 . ?s pq:P570 ?value1 . ?s pq:P569 ?value2 }
joseph stalin: Q855 yakov dzhugashvili: Q163816