{"id":"S89002539","label":"Polymerase chain reaction","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh89002539","normalized_label":"polymerase chain reaction","broader":["http://id.loc.gov/authorities/subjects/sh89001625"],"aliases":["Chain reaction, Polymerase","PCR (Biochemistry)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh89002539","provider":"lcsh","revision":"437f8b1a8aff2f93","taxonomy_revision":"f050b5d4780b1289","title":"Polymerase chain reaction","url":"/topics/S89002539","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9278761034682876418","address_version":"morton4x16-v1","coordinates":[0,21,14408,44032],"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}