{"id":"S85041951","label":"Electric railroads--Communication systems","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85041951","normalized_label":"electric railroads--communication systems","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85041951","provider":"lcsh","revision":"3b9f3788fd6f036f","taxonomy_revision":"f050b5d4780b1289","title":"Electric railroads--Communication systems","url":"/topics/S85041951","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"903125932867470848","address_version":"morton4x16-v1","coordinates":[0,20,18060,31744],"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}