Question: Mention the date of birth and death of Louis IX of France having child Peter, Count of Perche and Alençon
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q346 p:P40 ?s . ?s ps:P40 wd:Q739327 . ?s pq:P570 ?value1 . ?s pq:P569 ?value2 }