{"id":"S90002781","label":"Silica Formation (Ohio and Mich.)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh90002781","normalized_label":"silica formation (ohio and mich.)","broader":["http://id.loc.gov/authorities/subjects/sh85054093","http://id.loc.gov/authorities/subjects/sh87007848","http://id.loc.gov/authorities/subjects/sh90002779"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh90002781","provider":"lcsh","revision":"a6a83c6b928fa176","taxonomy_revision":"f050b5d4780b1289","title":"Silica Formation (Ohio and Mich.)","url":"/topics/S90002781","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"922125235091015174","address_version":"morton4x16-v1","coordinates":[0,21,30037,29696],"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}