{"id":"S85130722","label":"Surface hardening","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85130722","normalized_label":"surface hardening","broader":["http://id.loc.gov/authorities/subjects/sh85084195","http://id.loc.gov/authorities/subjects/sh85084204","http://id.loc.gov/authorities/subjects/sh85084205","http://id.loc.gov/authorities/subjects/sh85128673"],"aliases":["Hardening, Surface"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85130722","provider":"lcsh","revision":"d067419f14f63fd9","taxonomy_revision":"f050b5d4780b1289","title":"Surface hardening","url":"/topics/S85130722","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9511813812442236484","address_version":"morton4x16-v1","coordinates":[0,20,19447,34816],"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}