{"id":"S85110945","label":"Railroads--Curves and turnouts","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85110945","normalized_label":"railroads--curves and turnouts","broader":["http://id.loc.gov/authorities/subjects/sh85034931"],"aliases":["Railroad tracks--Curves and turnouts","Railroads--Turnouts","Transition curve","Turnouts, Railroad"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85110945","provider":"lcsh","revision":"df445b53041b59ae","taxonomy_revision":"f050b5d4780b1289","title":"Railroads--Curves and turnouts","url":"/topics/S85110945","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9511681853862576704","address_version":"morton4x16-v1","coordinates":[0,20,19138,33792],"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}