Question: Which famous writer was married to Jill Krementz and had a son named Edith Vonnegut ?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/spouse> <http://dbpedia.org/resource/Jill_Krementz> . ?uri <http://dbpedia.org/ontology/child> <http://dbpedia.org/resource/Edith_Vonnegut>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Writer>}