Question: When is {date of death} and {date of birth} of {{Louis IX of France} who has {child} as {John Tristan, Count of Valois}}?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q346 p:P40 ?s . ?s ps:P40 wd:Q648617 . ?s pq:P570 ?value1 . ?s pq:P569 ?value2 }