https://w3id.org/framester/conceptnet5/data/en/furan <https://w3id.org/framester/conceptnet5/schema/EtymologicallyDerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/an> <https://w3id.org/framester/conceptnet5/data/en/furfural> <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/chemical_compound> <https://w3id.org/framester/conceptnet5/data/en/chemical_substance> risorse dalla linked data cloud