{"id":"S99004973","label":"Chemical warfare","description":"Use as a topical subdivision under individual wars.","source_url":"https://id.loc.gov/authorities/subjects/sh99004973","normalized_label":"chemical warfare","broader":[],"aliases":["Chemistry"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh99004973","provider":"lcsh","revision":"5c0633f305620852","taxonomy_revision":"f050b5d4780b1289","title":"Chemical warfare","url":"/topics/S99004973","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"13874543992877761058","address_version":"morton4x16-v1","coordinates":[0,23,39624,46080],"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}