{"id":"S2008110413","label":"Railroads--United States--Safety measures","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2008110413","normalized_label":"railroads--united states--safety measures","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2008110413","provider":"lcsh","revision":"432ab45075ecb97b","taxonomy_revision":"f050b5d4780b1289","title":"Railroads--United States--Safety measures","url":"/topics/S2008110413","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4938210211959023140","address_version":"morton4x16-v1","coordinates":[0,478,50517,13312],"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}