Which fictional character's relative is Clan McDuck and belongs to American Pekin duck?
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/relatives> <http://dbpedia.org/resource/Clan_McDuck> . ?uri <http://dbpedia.org/ontology/species> <http://dbpedia.org/resource/American_Pekin_duck>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/FictionalCharacter>}
Clan_McDuck American_Pekin_duck