https://w3id.org/framester/conceptnet5/data/en/refringence.n <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/refraction> <https://w3id.org/framester/conceptnet5/data/en/power> <https://w3id.org/framester/conceptnet5/data/en/refractive> risorse dalla linked data cloud