{"id":"S85051930","label":"Frequency relays","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85051930","normalized_label":"frequency relays","broader":["http://id.loc.gov/authorities/subjects/sh85041985","http://id.loc.gov/authorities/subjects/sh85042254"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85051930","provider":"lcsh","revision":"947cce33d0e3b83a","taxonomy_revision":"f050b5d4780b1289","title":"Frequency relays","url":"/topics/S85051930","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"900865353071084032","address_version":"morton4x16-v1","coordinates":[0,20,18216,26624],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}