{"id":"S85090628","label":"Negative resistance devices","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85090628","normalized_label":"negative resistance devices","broader":["http://id.loc.gov/authorities/subjects/sh85041986","http://id.loc.gov/authorities/subjects/sh85042254"],"aliases":["Negatrons"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85090628","provider":"lcsh","revision":"8f19dae07b03fc98","taxonomy_revision":"f050b5d4780b1289","title":"Negative resistance devices","url":"/topics/S85090628","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"290552562963318276","address_version":"morton4x16-v1","coordinates":[0,20,18821,4096],"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}