https://w3id.org/framester/conceptnet5/data/en/virtual_reality <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/reality.n> <https://w3id.org/framester/conceptnet5/data/en/virtual.a> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/visual_information_source> risorse dalla linked data cloud