{"id":"S95005647","label":"Opacity (Optics)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh95005647","normalized_label":"opacity (optics)","broader":["http://id.loc.gov/authorities/subjects/sh85095181"],"aliases":["Absorptivity (Optics)","Density, Optical","Optical density"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh95005647","provider":"lcsh","revision":"68447e8dba1b9fd4","taxonomy_revision":"f050b5d4780b1289","title":"Opacity (Optics)","url":"/topics/S95005647","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4668135221353399908","address_version":"morton4x16-v1","coordinates":[0,22,42671,15360],"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}