{"id":"S2020000637","label":"NOx storage-reduction catalysts","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2020000637","normalized_label":"nox storage-reduction catalysts","broader":["http://id.loc.gov/authorities/subjects/sh2020000638","http://id.loc.gov/authorities/subjects/sh85020940"],"aliases":["NOx storage and reduction catalysts","NSR catalysts","Nitrogen oxides storage-reduction catalysts"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2020000637","provider":"lcsh","revision":"d997c26c6acc5570","taxonomy_revision":"f050b5d4780b1289","title":"NOx storage-reduction catalysts","url":"/topics/S2020000637","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14451004770382529542","address_version":"morton4x16-v1","coordinates":[0,481,39693,62464],"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}