{"id":"S85077992","label":"Locomotive boiler explosions","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85077992","normalized_label":"locomotive boiler explosions","broader":["http://id.loc.gov/authorities/subjects/sh85127643"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85077992","provider":"lcsh","revision":"4c5fbc02054b7728","taxonomy_revision":"f050b5d4780b1289","title":"Locomotive boiler explosions","url":"/topics/S85077992","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9547701579847976516","address_version":"morton4x16-v1","coordinates":[0,20,18623,40960],"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}