Question: Who are the  judges of the television show whose anchor is Josh Groban?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/presenter> <http://dbpedia.org/resource/Josh_Groban> . ?x <http://dbpedia.org/property/judges> ?uri . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TelevisionShow>}