{"id":"S99005345","label":"Corrosion","description":"Use as a topical subdivision under individual metals and metal compounds, individual materials and types of materials, and types of engineering structures, equipment, and vehicles.","source_url":"https://id.loc.gov/authorities/subjects/sh99005345","normalized_label":"corrosion","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh99005345","provider":"lcsh","revision":"68b6be00e720813a","taxonomy_revision":"f050b5d4780b1289","title":"Corrosion","url":"/topics/S99005345","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"13836263396045112930","address_version":"morton4x16-v1","coordinates":[0,23,39630,33792],"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}