{"id":"S2023001729","label":"Potomac breccia","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2023001729","normalized_label":"potomac breccia","broader":["http://id.loc.gov/authorities/subjects/sh85016703","http://id.loc.gov/authorities/subjects/sh85031089"],"aliases":["Calico marble","Columbian marble","Frederick County marble","Potomac marble"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2023001729","provider":"lcsh","revision":"e0f6f4328015b29a","taxonomy_revision":"f050b5d4780b1289","title":"Potomac breccia","url":"/topics/S2023001729","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"289365356196413536","address_version":"morton4x16-v1","coordinates":[0,482,21050,1024],"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}