{"id":"S2012002461","label":"Internal combustion engines--Exhaust gas","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2012002461","normalized_label":"internal combustion engines--exhaust gas","broader":["http://id.loc.gov/authorities/subjects/sh85028840"],"aliases":["Emissions, Internal combustion engine","Exhaust gas, Internal combustion engine","Internal combustion engine emissions","Internal combustion engine exhaust gas","Internal combustion engines--Emissions"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2012002461","provider":"lcsh","revision":"a970683b147ca9f4","taxonomy_revision":"f050b5d4780b1289","title":"Internal combustion engines--Exhaust gas","url":"/topics/S2012002461","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"5245576747256259170","address_version":"morton4x16-v1","coordinates":[0,479,45794,29696],"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}