https://w3id.org/framester/conceptnet5/data/en/pentagonal <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/pentagon.n> <https://w3id.org/framester/conceptnet5/schema/Synonym> <https://w3id.org/framester/conceptnet5/data/en/pentagon> risorse dalla linked data cloud