{"id":"S85120466","label":"Sewage--Purification--Biological treatment","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85120466","normalized_label":"sewage--purification--biological treatment","broader":["http://id.loc.gov/authorities/subjects/sh85120499","http://id.loc.gov/authorities/subjects/sh89005627"],"aliases":["BNR (Sewage treatment)","Biological nutrient removal (Sewage treatment)","Sewage--Biological treatment"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85120466","provider":"lcsh","revision":"2a726d0515efb58a","taxonomy_revision":"f050b5d4780b1289","title":"Sewage--Purification--Biological treatment","url":"/topics/S85120466","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"864902526812948036","address_version":"morton4x16-v1","coordinates":[0,20,19287,18432],"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}