{"id":"S85038251","label":"Direct current amplifiers","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85038251","normalized_label":"direct current amplifiers","broader":["http://id.loc.gov/authorities/subjects/sh85004652"],"aliases":["Amplifiers, Direct current"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85038251","provider":"lcsh","revision":"bdfcf76d68159036","taxonomy_revision":"f050b5d4780b1289","title":"Direct current amplifiers","url":"/topics/S85038251","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9547785416598749760","address_version":"morton4x16-v1","coordinates":[0,20,18002,44032],"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}