Count the different genres of music made by Argentinian bands?
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/hometown> <http://dbpedia.org/resource/Argentina> . ?x <http://dbpedia.org/ontology/genre> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/MusicGenre>}
Argentina