https://w3id.org/framester/conceptnet5/data/en/command_ship <https://w3id.org/framester/conceptnet5/schema/HasPrerequisite> <https://w3id.org/framester/conceptnet5/data/en/join_navy> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/modern_naval_ship> risorse dalla linked data cloud