https://w3id.org/framester/conceptnet5/data/en/ketohexose <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/hexose.n> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/aldohexose> <https://w3id.org/framester/conceptnet5/data/en/hexulose> risorse dalla linked data cloud