{"id":"S85032319","label":"Copper--Purification","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85032319","normalized_label":"copper--purification","broader":[],"aliases":["Purification of copper"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85032319","provider":"lcsh","revision":"bf0fcbad6a9ee166","taxonomy_revision":"f050b5d4780b1289","title":"Copper--Purification","url":"/topics/S85032319","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10126497712095757828","address_version":"morton4x16-v1","coordinates":[0,20,17909,64512],"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}