{"id":"S85147184","label":"Wittig reaction","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85147184","normalized_label":"wittig reaction","broader":["http://id.loc.gov/authorities/subjects/sh85022952"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85147184","provider":"lcsh","revision":"b670439150464735","taxonomy_revision":"f050b5d4780b1289","title":"Wittig reaction","url":"/topics/S85147184","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10088137933246054912","address_version":"morton4x16-v1","coordinates":[0,20,19704,49152],"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}