https://w3id.org/framester/conceptnet5/data/en/sea_mammal <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/animal> <https://w3id.org/framester/conceptnet5/data/en/marine_organism> <https://w3id.org/framester/conceptnet5/data/en/placental_mammal> <https://w3id.org/framester/conceptnet5/data/en/non_person_animal> risorse dalla linked data cloud