{"id":"S85141748","label":"Vacuum-tubes--Thermionic emission","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85141748","normalized_label":"vacuum-tubes--thermionic emission","broader":["http://id.loc.gov/authorities/subjects/sh85134769"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85141748","provider":"lcsh","revision":"fc37f031761d6c89","taxonomy_revision":"f050b5d4780b1289","title":"Vacuum-tubes--Thermionic emission","url":"/topics/S85141748","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10090389732992352836","address_version":"morton4x16-v1","coordinates":[0,20,19619,53248],"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}