{"id":"S85122497","label":"Silica-alumina catalysts","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85122497","normalized_label":"silica-alumina catalysts","broader":["http://id.loc.gov/authorities/subjects/sh85020940"],"aliases":["Alumina-silica catalysts"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85122497","provider":"lcsh","revision":"994e8b9561972970","taxonomy_revision":"f050b5d4780b1289","title":"Silica-alumina catalysts","url":"/topics/S85122497","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"288309833118385732","address_version":"morton4x16-v1","coordinates":[0,20,19319,1024],"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}