https://w3id.org/framester/conceptnet5/data/en/truth_value <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/notation> <https://w3id.org/framester/conceptnet5/data/en/individual_mathematical_object> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/truth_table> risorse dalla linked data cloud