Count the number of characters in Batman Live?
SELECT DISTINCT COUNT(?uri) WHERE { <http://dbpedia.org/resource/Batman_Live> <http://dbpedia.org/property/characters> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/ComicsCharacter>}
Batman_Live