{"id":"S2018003164","label":"Railguns","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2018003164","normalized_label":"railguns","broader":["http://id.loc.gov/authorities/subjects/sh85095395"],"aliases":["Electromagnetic railguns","Rail guns"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2018003164","provider":"lcsh","revision":"ca5f9b521829a810","taxonomy_revision":"f050b5d4780b1289","title":"Railguns","url":"/topics/S2018003164","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"632755773992075334","address_version":"morton4x16-v1","coordinates":[0,481,8483,28672],"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}