{"id":"S2019000488","label":"AC-to-AC converters","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2019000488","normalized_label":"ac-to-ac converters","broader":["http://id.loc.gov/authorities/subjects/sh85041637"],"aliases":["AC-AC power converters","Alternating current to alternating current converters"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2019000488","provider":"lcsh","revision":"18a6875193ae8eae","taxonomy_revision":"f050b5d4780b1289","title":"AC-to-AC converters","url":"/topics/S2019000488","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9548832160763347010","address_version":"morton4x16-v1","coordinates":[0,481,24066,40960],"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}