{"id":"S2009124938","label":"Engineering--History","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2009124938","normalized_label":"engineering--history","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2009124938","provider":"lcsh","revision":"58f53d68e497ccf2","taxonomy_revision":"f050b5d4780b1289","title":"Engineering--History","url":"/topics/S2009124938","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"36169835792704038","address_version":"morton4x16-v1","coordinates":[0,479,833,10240],"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}