{"id":"S85054113","label":"Geology, Stratigraphic--Silurian","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85054113","normalized_label":"geology, stratigraphic--silurian","broader":["http://id.loc.gov/authorities/subjects/sh85054105"],"aliases":["Silurian Period"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85054113","provider":"lcsh","revision":"09032fff43d70746","taxonomy_revision":"f050b5d4780b1289","title":"Geology, Stratigraphic--Silurian","url":"/topics/S85054113","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9511615899271053888","address_version":"morton4x16-v1","coordinates":[0,20,18250,33792],"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}