{"id":"S85110274","label":"Rack-railroads","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85110274","normalized_label":"rack-railroads","broader":["http://id.loc.gov/authorities/subjects/sh85087801","http://id.loc.gov/authorities/subjects/sh85110904"],"aliases":["Cog railroads","Railroads, Cog","Railroads, Rack"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85110274","provider":"lcsh","revision":"5ea6b2c0a40db6fd","taxonomy_revision":"f050b5d4780b1289","title":"Rack-railroads","url":"/topics/S85110274","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"288441758340497920","address_version":"morton4x16-v1","coordinates":[0,20,19128,2048],"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}