{"id":"S85112506","label":"Relay control systems","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85112506","normalized_label":"relay control systems","broader":["http://id.loc.gov/authorities/subjects/sh85010089","http://id.loc.gov/authorities/subjects/sh85041985"],"aliases":["Control systems, Relay"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85112506","provider":"lcsh","revision":"6a658cbabaaf2a58","taxonomy_revision":"f050b5d4780b1289","title":"Relay control systems","url":"/topics/S85112506","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10124303344580575808","address_version":"morton4x16-v1","coordinates":[0,20,19162,59392],"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}