{"id":"S85087582","label":"Motor fuels--Anti-knock and anti-knock mixtures","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85087582","normalized_label":"motor fuels--anti-knock and anti-knock mixtures","broader":[],"aliases":["Anti-knock compounds","Octane number"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85087582","provider":"lcsh","revision":"bf89f05bb0158891","taxonomy_revision":"f050b5d4780b1289","title":"Motor fuels--Anti-knock and anti-knock mixtures","url":"/topics/S85087582","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"903182848767690244","address_version":"morton4x16-v1","coordinates":[0,20,18773,30720],"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}