{"id":"S85138669","label":"Tunnel lining","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85138669","normalized_label":"tunnel lining","broader":["http://id.loc.gov/authorities/subjects/sh85138670","http://id.loc.gov/authorities/subjects/sh85138674"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85138669","provider":"lcsh","revision":"6d8296b5c5a5c38d","taxonomy_revision":"f050b5d4780b1289","title":"Tunnel lining","url":"/topics/S85138669","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9549966572794544708","address_version":"morton4x16-v1","coordinates":[0,20,19571,46080],"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}