https://w3id.org/framester/conceptnet5/data/en/robert_h_goddard <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/person> <https://w3id.org/framester/conceptnet5/data/en/invention> <https://w3id.org/framester/conceptnet5/data/en/professor> <https://w3id.org/framester/conceptnet5/data/en/physicist> <https://w3id.org/framester/conceptnet5/data/en/aerospace_engineer> <https://w3id.org/framester/conceptnet5/schema/dbpedia.knownFor> <https://w3id.org/framester/conceptnet5/data/en/liquid_propellant_rocket> risorse dalla linked data cloud