{"id":"S95010319","label":"Progressive rock music","description":"This heading is assigned to progressive rock music for two or more performers.","source_url":"https://id.loc.gov/authorities/subjects/sh95010319","normalized_label":"progressive rock music","broader":["http://id.loc.gov/authorities/subjects/sh85114675"],"aliases":["Art rock music","Prog rock"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh95010319","provider":"lcsh","revision":"861c745546b6939b","taxonomy_revision":"f050b5d4780b1289","title":"Progressive rock music","url":"/topics/S95010319","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4668135221420769824","address_version":"morton4x16-v1","coordinates":[0,22,42744,15360],"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}