https://w3id.org/framester/conceptnet5/data/en/intangible_individual_object <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/intangible> <https://w3id.org/framester/conceptnet5/data/en/partially_intangible_individual> risorse dalla linked data cloud