{"id":"S2010001869","label":"Acid mine drainage--Purification--Aeration","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2010001869","normalized_label":"acid mine drainage--purification--aeration","broader":[],"aliases":["Aeration of acid mine drainage"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2010001869","provider":"lcsh","revision":"fefbd19626704c7d","taxonomy_revision":"f050b5d4780b1289","title":"Acid mine drainage--Purification--Aeration","url":"/topics/S2010001869","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"57500070387525222","address_version":"morton4x16-v1","coordinates":[0,479,14535,13312],"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}