https://w3id.org/framester/conceptnet5/data/en/abc_of_communism <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/book> <https://w3id.org/framester/conceptnet5/data/en/write_work> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/book> risorse dalla linked data cloud