{"id":"S85145490","label":"Water--Purification--Iron removal","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85145490","normalized_label":"water--purification--iron removal","broader":[],"aliases":["Iron removal (Water purification)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85145490","provider":"lcsh","revision":"8feb88b4a7b26dae","taxonomy_revision":"f050b5d4780b1289","title":"Water--Purification--Iron removal","url":"/topics/S85145490","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"864906633875441216","address_version":"morton4x16-v1","coordinates":[0,20,19678,18432],"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}