https://w3id.org/framester/conceptnet5/data/en/root_rock <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/genre> <https://w3id.org/framester/conceptnet5/data/en/music_genre> <https://w3id.org/framester/conceptnet5/data/en/topical_concept> risorse dalla linked data cloud