https://w3id.org/framester/conceptnet5/data/en/mastiff <https://w3id.org/framester/conceptnet5/schema/EtymologicallyDerivedFrom> <https://w3id.org/framester/conceptnet5/cla/fro.mastin> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/work_dog> risorse dalla linked data cloud