{"id":"S85084140","label":"Metallurgical furnaces--Protective atmospheres","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85084140","normalized_label":"metallurgical furnaces--protective atmospheres","broader":["http://id.loc.gov/authorities/subjects/sh85107645"],"aliases":["Furnace atmospheres"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85084140","provider":"lcsh","revision":"a77672feec7ffc08","taxonomy_revision":"f050b5d4780b1289","title":"Metallurgical furnaces--Protective atmospheres","url":"/topics/S85084140","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9549953395763594820","address_version":"morton4x16-v1","coordinates":[0,20,18719,45056],"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}