Question: Which is the father and the date of death  of Abigail Adams child the Thomas Boylston Adams?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q206191 p:P40 ?s . ?s ps:P40 wd:Q7787805 . ?s pq:P22 ?value1 . ?s pq:P570 ?value2 }