https://w3id.org/framester/conceptnet5/data/en/radio_frequency <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/hf> <https://w3id.org/framester/conceptnet5/data/en/uhf> <https://w3id.org/framester/conceptnet5/data/en/lf> <https://w3id.org/framester/conceptnet5/data/en/elf> <https://w3id.org/framester/conceptnet5/data/en/vhf> <https://w3id.org/framester/conceptnet5/data/en/vlf> <https://w3id.org/framester/conceptnet5/data/en/shf> risorse dalla linked data cloud