https://w3id.org/framester/conceptnet5/data/en/topological_space <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/topological.a> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/notation> <https://w3id.org/framester/conceptnet5/data/en/tuple> risorse dalla linked data cloud