https://w3id.org/framester/conceptnet5/data/en/proto_indo_iranian <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/proto> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/indo_european> <https://w3id.org/framester/conceptnet5/data/en/proto_indo_european> risorse dalla linked data cloud