{"id":"S98002618","label":"Reinforced concrete--Cathodic protection","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh98002618","normalized_label":"reinforced concrete--cathodic protection","broader":["http://id.loc.gov/authorities/subjects/sh85021038"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh98002618","provider":"lcsh","revision":"703d86bf227c5492","taxonomy_revision":"f050b5d4780b1289","title":"Reinforced concrete--Cathodic protection","url":"/topics/S98002618","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10125433384768782946","address_version":"morton4x16-v1","coordinates":[0,23,23962,59392],"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}