{"id":"S2008121145","label":"Free electron lasers--Congresses","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2008121145","normalized_label":"free electron lasers--congresses","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2008121145","provider":"lcsh","revision":"d5ef1ebd5c7638b6","taxonomy_revision":"f050b5d4780b1289","title":"Free electron lasers--Congresses","url":"/topics/S2008121145","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14735791202381489696","address_version":"morton4x16-v1","coordinates":[0,478,50684,58368],"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}