{"id":"S98005921","label":"Enhanced oil recovery","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh98005921","normalized_label":"enhanced oil recovery","broader":["http://id.loc.gov/authorities/subjects/sh85094324"],"aliases":["EOR (Petroleum engineering)","Improved oil recovery","Oil fields--Enhanced recovery operations","Tertiary recovery of oil"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh98005921","provider":"lcsh","revision":"bac0f658ce7753d7","taxonomy_revision":"f050b5d4780b1289","title":"Enhanced oil recovery","url":"/topics/S98005921","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9512811894117910114","address_version":"morton4x16-v1","coordinates":[0,23,24014,33792],"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}