{"id":"S85015878","label":"Boron steel","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85015878","normalized_label":"boron steel","broader":["http://id.loc.gov/authorities/subjects/sh85127809"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85015878","provider":"lcsh","revision":"04de0a0bb8f27e0d","taxonomy_revision":"f050b5d4780b1289","title":"Boron steel","url":"/topics/S85015878","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"290627312645703172","address_version":"morton4x16-v1","coordinates":[0,20,17653,6144],"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}