{"id":"S91002467","label":"Sewage--Purification--Chlorine removal","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh91002467","normalized_label":"sewage--purification--chlorine removal","broader":[],"aliases":["Chlorine removal (Sewage purification)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh91002467","provider":"lcsh","revision":"30946e5c39dfe8eb","taxonomy_revision":"f050b5d4780b1289","title":"Sewage--Purification--Chlorine removal","url":"/topics/S91002467","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"13854348162225291782","address_version":"morton4x16-v1","coordinates":[0,21,45657,35840],"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}