{"id":"S2006008842","label":"Railroad plants--Control","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2006008842","normalized_label":"railroad plants--control","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2006008842","provider":"lcsh","revision":"10e1f2c755bcb798","taxonomy_revision":"f050b5d4780b1289","title":"Railroad plants--Control","url":"/topics/S2006008842","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"324404335046173216","address_version":"morton4x16-v1","coordinates":[0,478,17680,10240],"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}