{"id":"S85110933","label":"Railroads--Communication systems","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85110933","normalized_label":"railroads--communication systems","broader":["http://id.loc.gov/authorities/subjects/sh85086371"],"aliases":["Communications, Railroad","Railroad communication systems"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85110933","provider":"lcsh","revision":"a0d7240ce88cd7da","taxonomy_revision":"f050b5d4780b1289","title":"Railroads--Communication systems","url":"/topics/S85110933","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"867022369124909632","address_version":"morton4x16-v1","coordinates":[0,20,19138,21504],"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}