https://w3id.org/framester/conceptnet5/data/en/ptolemy <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/cla/la.ptolemaeus.n> <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/person> <https://w3id.org/framester/conceptnet5/data/en/mathematician> <https://w3id.org/framester/conceptnet5/data/en/astrologer> <https://w3id.org/framester/conceptnet5/data/en/geographer> <https://w3id.org/framester/conceptnet5/data/en/astronomer> risorse dalla linked data cloud