{"id":"S2004008229","label":"Mallard (Steam locomotive)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2004008229","normalized_label":"mallard (steam locomotive)","broader":["http://id.loc.gov/authorities/subjects/sh86007644"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2004008229","provider":"lcsh","revision":"8053eac7015038a4","taxonomy_revision":"f050b5d4780b1289","title":"Mallard (Steam locomotive)","url":"/topics/S2004008229","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14125619681268475394","address_version":"morton4x16-v1","coordinates":[0,477,51956,37888],"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}