{"id":"S85001406","label":"Aeronautics in railroad engineering","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85001406","normalized_label":"aeronautics in railroad engineering","broader":["http://id.loc.gov/authorities/subjects/sh85110872"],"aliases":["Airplanes in railroad engineering"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85001406","provider":"lcsh","revision":"015716ebdbb5f3c4","taxonomy_revision":"f050b5d4780b1289","title":"Aeronautics in railroad engineering","url":"/topics/S85001406","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10126488897677820480","address_version":"morton4x16-v1","coordinates":[0,20,17426,63488],"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}