{"id":"S85011224","label":"Ballad opera","description":"Here are entered works about ballad opera. Musical compositions in this form are entered under the heading [Ballad operas.]","source_url":"https://id.loc.gov/authorities/subjects/sh85011224","normalized_label":"ballad opera","broader":["http://id.loc.gov/authorities/subjects/sh85043338","http://id.loc.gov/authorities/subjects/sh85043353","http://id.loc.gov/authorities/subjects/sh85094900"],"aliases":["Ballad opera--History and criticism","Ballad operas--History and criticism"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85011224","provider":"lcsh","revision":"7d9c14a5ff33d164","taxonomy_revision":"f050b5d4780b1289","title":"Ballad opera","url":"/topics/S85011224","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"900724324598695424","address_version":"morton4x16-v1","coordinates":[0,20,17580,24576],"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}