{"id":"S85111070","label":"Railroad tracklaying machinery","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85111070","normalized_label":"railroad tracklaying machinery","broader":["http://id.loc.gov/authorities/subjects/sh2006005697"],"aliases":["Railroad track-laying machinery","Railroads--Tracklaying machinery","Track-laying machinery (Railroads)","Tracklaying machinery (Railroads)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85111070","provider":"lcsh","revision":"5a30523e9eb93d28","taxonomy_revision":"f050b5d4780b1289","title":"Railroad tracklaying machinery","url":"/topics/S85111070","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"903183107539207680","address_version":"morton4x16-v1","coordinates":[0,20,19140,30720],"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}