https://w3id.org/framester/conceptnet5/data/en/douglass_north <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/person> <https://w3id.org/framester/conceptnet5/data/en/economist> <https://w3id.org/framester/conceptnet5/schema/dbpedia.field> <https://w3id.org/framester/conceptnet5/data/en/economic_history> <https://w3id.org/framester/conceptnet5/schema/dbpedia.influencedBy> <https://w3id.org/framester/conceptnet5/data/en/melvin_m_knight> risorse dalla linked data cloud