When was born and died Joseph Stalin who has a child Artem Sergeev?
SELECT ?value1 ?value2 WHERE { wd:Q855 p:P40 ?s . ?s ps:P40 wd:Q4416801 . ?s pq:P570 ?value1 . ?s pq:P569 ?value2 }
joseph stalin: Q855 artem sergeev: Q4416801