{"id":"S85084129","label":"Metallocenes","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85084129","normalized_label":"metallocenes","broader":["http://id.loc.gov/authorities/subjects/sh85095561"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85084129","provider":"lcsh","revision":"72e7378bb8c1578c","taxonomy_revision":"f050b5d4780b1289","title":"Metallocenes","url":"/topics/S85084129","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9511681595023967812","address_version":"morton4x16-v1","coordinates":[0,20,18719,33792],"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}