{"id":"S85002604","label":"Air-brakes","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85002604","normalized_label":"air-brakes","broader":["http://id.loc.gov/authorities/subjects/sh85016379","http://id.loc.gov/authorities/subjects/sh85103613","http://id.loc.gov/authorities/subjects/sh85110911"],"aliases":["Railroads--Air-brakes"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85002604","provider":"lcsh","revision":"c486932c8b38be98","taxonomy_revision":"f050b5d4780b1289","title":"Air-brakes","url":"/topics/S85002604","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9549887407889974788","address_version":"morton4x16-v1","coordinates":[0,20,17445,45056],"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}