{"id":"S2001000693","label":"Calcium fluoride crystals","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2001000693","normalized_label":"calcium fluoride crystals","broader":["http://id.loc.gov/authorities/subjects/sh85034503"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2001000693","provider":"lcsh","revision":"8fef17c0a95283fc","taxonomy_revision":"f050b5d4780b1289","title":"Calcium fluoride crystals","url":"/topics/S2001000693","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9803219586261328454","address_version":"morton4x16-v1","coordinates":[0,477,4963,54272],"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}