{"id":"S95003031","label":"Water--Purification--Rapid sand filtration","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh95003031","normalized_label":"water--purification--rapid sand filtration","broader":["http://id.loc.gov/authorities/subjects/sh95003029"],"aliases":["Rapid downflow sand filtration","Rapid gravity sand filtration","Rapid sand filtration","Water--Rapid downflow sand filtration","Water--Rapid gravity sand filtration","Water--Rapid sand filtration"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh95003031","provider":"lcsh","revision":"93fc93d46fe2df8b","taxonomy_revision":"f050b5d4780b1289","title":"Water--Purification--Rapid sand filtration","url":"/topics/S95003031","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"5208567176633648736","address_version":"morton4x16-v1","coordinates":[0,22,42630,23552],"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}