Question: How many people have voiced characters sculpted by Clamp?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:creator <http://dbpedia.org/resource/Clamp_(manga_artists)> . ?x onto:voice ?uri . }