https://w3id.org/framester/conceptnet5/data/en/mulatto <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/ethnic_group> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/person_of_mix_race> risorse dalla linked data cloud