https://w3id.org/framester/conceptnet5/data/en/complex_number <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/number.n> <https://w3id.org/framester/conceptnet5/schema/HasA> <https://w3id.org/framester/conceptnet5/data/en/i_as_factor> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/number> risorse dalla linked data cloud