Question: List the judge of the TV show whose one of the judge is Ludacris ?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/judges> <http://dbpedia.org/resource/Ludacris> . ?x <http://dbpedia.org/property/judges> ?uri . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TelevisionShow>}