_:vb3868521 <http://www.w3.org/2000/01/rdf-schema#label> "Air d'op\u00E9ra" . _:vb3868521 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://data.doremus.org/ontology#M19_Categorization> .