Question: Whose relatives are Clan McDuck and Huey, Dewey, and Louie?
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
SELECT DISTINCT ?uri WHERE { ?uri prop:relatives <http://dbpedia.org/resource/Clan_McDuck> . ?uri prop:relatives <http://dbpedia.org/resource/Huey,_Dewey,_and_Louie> . }