{"id":"S85128572","label":"Stream self-purification","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85128572","normalized_label":"stream self-purification","broader":["http://id.loc.gov/authorities/subjects/sh85120461","http://id.loc.gov/authorities/subjects/sh85128564","http://id.loc.gov/authorities/subjects/sh85145478"],"aliases":["Natural purification of streams","Self-purification of streams"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85128572","provider":"lcsh","revision":"1cfb3897198679ef","taxonomy_revision":"f050b5d4780b1289","title":"Stream self-purification","url":"/topics/S85128572","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10126414424085759492","address_version":"morton4x16-v1","coordinates":[0,20,19413,61440],"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}