Question: Name the fictional character whose species is American Pekin duck and has relatives named Ludwig Von Drake?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE {?uri onto:species <http://dbpedia.org/resource/American_Pekin_duck> . ?uri prop:relatives <http://dbpedia.org/resource/Ludwig_Von_Drake> . ?uri rdf:type onto:FictionalCharacter}