{"id":"S90002781-781","label":"Silica Formation (Ohio and Mich.)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh90002781-781","normalized_label":"silica formation (ohio and mich.)","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh90002781-781","provider":"lcsh","revision":"26f3ed6e430932e8","taxonomy_revision":"f050b5d4780b1289","title":"Silica Formation (Ohio and Mich.)","url":"/topics/S90002781-781","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"922125819206602374","address_version":"morton4x16-v1","coordinates":[0,21,30037,30478],"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}