{"id":"S85141745","label":"Vacuum-tube voltmeters","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85141745","normalized_label":"vacuum-tube voltmeters","broader":["http://id.loc.gov/authorities/subjects/sh85042343","http://id.loc.gov/authorities/subjects/sh85144325"],"aliases":["Probes (Voltmeters)","Vacuum-tube voltmeter"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85141745","provider":"lcsh","revision":"5354d8200a3fd29e","taxonomy_revision":"f050b5d4780b1289","title":"Vacuum-tube voltmeters","url":"/topics/S85141745","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10088146729271689796","address_version":"morton4x16-v1","coordinates":[0,20,19619,50176],"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}