Question: How many people have voiced characters sculpted by Clamp?
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/creator> <http://dbpedia.org/resource/Clamp_(manga_artists)> . ?x <http://dbpedia.org/ontology/voice> ?uri  . }
Answer: There are [32] people who voiced characters created by Clamp.