{"id":"S95003030","label":"Water--Purification--Slow sand filtration","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh95003030","normalized_label":"water--purification--slow sand filtration","broader":["http://id.loc.gov/authorities/subjects/sh95003029"],"aliases":["Slow sand filtration","Water--Slow sand filtration"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh95003030","provider":"lcsh","revision":"78636affbc2fb232","taxonomy_revision":"f050b5d4780b1289","title":"Water--Purification--Slow sand filtration","url":"/topics/S95003030","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"5208558380540626528","address_version":"morton4x16-v1","coordinates":[0,22,42630,22528],"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}