https://w3id.org/framester/conceptnet5/data/en/unique_factorization_domain <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/ring.n> <https://w3id.org/framester/conceptnet5/data/en/integral_domain.n> <https://w3id.org/framester/conceptnet5/data/en/commutative_ring.n> <https://w3id.org/framester/conceptnet5/data/en/unique_factorization_ring.n> risorse dalla linked data cloud