{"id":"S2011002492","label":"Spark ignition engines--Aerodynamics","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2011002492","normalized_label":"spark ignition engines--aerodynamics","broader":["http://id.loc.gov/authorities/subjects/sh85001295"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2011002492","provider":"lcsh","revision":"249792328f97ba5c","taxonomy_revision":"f050b5d4780b1289","title":"Spark ignition engines--Aerodynamics","url":"/topics/S2011002492","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10145488486086894118","address_version":"morton4x16-v1","coordinates":[0,479,30169,61440],"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}