Question: When did Abigail Adams' child John Quincy Adams die, and who was his father?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q206191 p:P40 ?s . ?s ps:P40 wd:Q11816 . ?s pq:P22 ?value1 . ?s pq:P570 ?value2 }