{"id":"S85105391","label":"Positronium","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85105391","normalized_label":"positronium","broader":["http://id.loc.gov/authorities/subjects/sh85042423","http://id.loc.gov/authorities/subjects/sh85093069","http://id.loc.gov/authorities/subjects/sh85105392"],"aliases":["Electron-positron pairs","Positron-electron pairs"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85105391","provider":"lcsh","revision":"ce2e6910ddd4cc89","taxonomy_revision":"f050b5d4780b1289","title":"Positronium","url":"/topics/S85105391","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9550103187114050116","address_version":"morton4x16-v1","coordinates":[0,20,19051,48128],"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}