https://w3id.org/framester/conceptnet5/data/en/perfervid <https://w3id.org/framester/conceptnet5/schema/EtymologicallyDerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/perfervidus> <https://w3id.org/framester/conceptnet5/cla/la.per> <https://w3id.org/framester/conceptnet5/data/en/fervidus> risorse dalla linked data cloud