{"id":"S85004646","label":"Audio amplifiers","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85004646","normalized_label":"audio amplifiers","broader":["http://id.loc.gov/authorities/subjects/sh85004652"],"aliases":["Amplifiers, Audio","Audio-frequency amplifiers"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85004646","provider":"lcsh","revision":"04400e139d274d1c","taxonomy_revision":"f050b5d4780b1289","title":"Audio amplifiers","url":"/topics/S85004646","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9513999348422280708","address_version":"morton4x16-v1","coordinates":[0,20,17477,38912],"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}