{"id":"S85083806","label":"Mercury-arc rectifiers","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85083806","normalized_label":"mercury-arc rectifiers","broader":["http://id.loc.gov/authorities/subjects/sh85041638"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85083806","provider":"lcsh","revision":"7532b444939b161b","taxonomy_revision":"f050b5d4780b1289","title":"Mercury-arc rectifiers","url":"/topics/S85083806","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"903182848700596800","address_version":"morton4x16-v1","coordinates":[0,20,18714,30720],"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}