{"id":"S85099972","label":"Perkin reaction","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85099972","normalized_label":"perkin reaction","broader":["http://id.loc.gov/authorities/subjects/sh85022952"],"aliases":["Perkin synthesis","Perkin's reaction"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85099972","provider":"lcsh","revision":"6153ce8f4f3ed780","taxonomy_revision":"f050b5d4780b1289","title":"Perkin reaction","url":"/topics/S85099972","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"290552819587876420","address_version":"morton4x16-v1","coordinates":[0,20,18967,4096],"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}