https://w3id.org/framester/conceptnet5/data/en/amicable_number <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/amicable.a> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/deficient_number> <https://w3id.org/framester/conceptnet5/data/en/perfect_number> <https://w3id.org/framester/conceptnet5/data/en/abundant_number> <https://w3id.org/framester/conceptnet5/data/en/sociable_number> risorse dalla linked data cloud