{"id":"S92006732","label":"Bifocal lenses","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh92006732","normalized_label":"bifocal lenses","broader":["http://id.loc.gov/authorities/subjects/sh85095064"],"aliases":["Bifocals","Lenses, Bifocal"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh92006732","provider":"lcsh","revision":"78680f42bb0bdfe0","taxonomy_revision":"f050b5d4780b1289","title":"Bifocal lenses","url":"/topics/S92006732","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4956286449847764486","address_version":"morton4x16-v1","coordinates":[0,21,61349,12288],"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}