{"id":"S93003250","label":"Petroleum waste--Purification","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh93003250","normalized_label":"petroleum waste--purification","broader":[],"aliases":["Purification of petroleum waste"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh93003250","provider":"lcsh","revision":"866bb9a5f627c3ba","taxonomy_revision":"f050b5d4780b1289","title":"Petroleum waste--Purification","url":"/topics/S93003250","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9818062692018423396","address_version":"morton4x16-v1","coordinates":[0,22,11383,51200],"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}