https://w3id.org/framester/conceptnet5/data/en/catamaran <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/boat.n.a_craft_on_or_in_water> <https://w3id.org/framester/conceptnet5/data/en/multihull.n> risorse dalla linked data cloud