https://w3id.org/framester/conceptnet5/data/en/alexander_bogdanov <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/person> <https://w3id.org/framester/conceptnet5/data/en/philosopher> <https://w3id.org/framester/conceptnet5/data/en/physician> risorse dalla linked data cloud