https://w3id.org/framester/conceptnet5/data/en/atomic_weight <https://w3id.org/framester/conceptnet5/schema/DefinedAs> <https://w3id.org/framester/conceptnet5/data/en/number_of_proton_plus_number_of_neutron_in_atom> <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/atomic.a> risorse dalla linked data cloud