Question: Name the fictional character whose relative are Duck family and Clan McDuck?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/relative> <http://dbpedia.org/resource/Duck_family_(Disney)> . ?uri <http://dbpedia.org/property/relatives> <http://dbpedia.org/resource/Clan_McDuck>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/FictionalCharacter>}