https://w3id.org/framester/conceptnet5/data/en/stone_pit <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/mine> <https://w3id.org/framester/conceptnet5/data/en/pit> <https://w3id.org/framester/conceptnet5/data/en/outdoor_location> risorse dalla linked data cloud