{"id":"S85042243","label":"Electron tubes--Thermionic emission","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85042243","normalized_label":"electron tubes--thermionic emission","broader":["http://id.loc.gov/authorities/subjects/sh85134769"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85042243","provider":"lcsh","revision":"6a9b155ebcf53218","taxonomy_revision":"f050b5d4780b1289","title":"Electron tubes--Thermionic emission","url":"/topics/S85042243","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"288384583731642884","address_version":"morton4x16-v1","coordinates":[0,20,18065,3072],"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}