Question: Whose opponents are Ike Clanton and Billy Clanton?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/ontology/opponent> <http://dbpedia.org/resource/Ike_Clanton> . ?uri <http://dbpedia.org/ontology/opponent> <http://dbpedia.org/resource/Billy_Clanton> . }
Answer: [Wyatt Earp] opponents are both Ike Clanton and Billy Clanton.