{"id":"S98000487","label":"Water treatment plants--Retrofitting","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh98000487","normalized_label":"water treatment plants--retrofitting","broader":[],"aliases":["Retrofit of water treatment plants","Retrofitting of water treatment plants"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh98000487","provider":"lcsh","revision":"8f1d51728032911b","taxonomy_revision":"f050b5d4780b1289","title":"Water treatment plants--Retrofitting","url":"/topics/S98000487","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9515204430350664230","address_version":"morton4x16-v1","coordinates":[0,23,23929,39936],"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}