Question: How many characters are there in The Office?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE {?uri <http://dbpedia.org/ontology/series> <http://dbpedia.org/resource/The_Office_(U.S._TV_series)>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/FictionalCharacter>}