Question: What is the fictional character which has Clan McDuck and Ludwig Von Draken as relatives?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?uri prop:relatives <http://dbpedia.org/resource/Clan_McDuck> . ?uri prop:relatives <http://dbpedia.org/resource/Ludwig_Von_Drake> . ?uri rdf:type onto:FictionalCharacter}