{"id":"S2005005889","label":"Studies and exercises (Progressive rock)","description":"Use as a form subdivision under individual musical instruments and families of instruments.","source_url":"https://id.loc.gov/authorities/subjects/sh2005005889","normalized_label":"studies and exercises (progressive rock)","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2005005889","provider":"lcsh","revision":"0c18434a0039e399","taxonomy_revision":"f050b5d4780b1289","title":"Studies and exercises (Progressive rock)","url":"/topics/S2005005889","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"13496498938404","address_version":"morton4x16-v1","coordinates":[0,478,2009,1024],"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}