{"id":"S85067806","label":"Ion rockets","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85067806","normalized_label":"ion rockets","broader":["http://id.loc.gov/authorities/subjects/sh85038254","http://id.loc.gov/authorities/subjects/sh85041995","http://id.loc.gov/authorities/subjects/sh85067842","http://id.loc.gov/authorities/subjects/sh85114729"],"aliases":["Electrostatic propulsion systems","Ion power","Ion propulsion","Ionic propulsion"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85067806","provider":"lcsh","revision":"b9d5ef98c42d9baa","taxonomy_revision":"f050b5d4780b1289","title":"Ion rockets","url":"/topics/S85067806","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"903182831524643328","address_version":"morton4x16-v1","coordinates":[0,20,18464,30720],"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}