{"id":"S2010006228","label":"Radon as a groundwater tracer","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2010006228","normalized_label":"radon as a groundwater tracer","broader":["http://id.loc.gov/authorities/subjects/sh85110636"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2010006228","provider":"lcsh","revision":"07e69cb5e3007105","taxonomy_revision":"f050b5d4780b1289","title":"Radon as a groundwater tracer","url":"/topics/S2010006228","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"597923245617996390","address_version":"morton4x16-v1","coordinates":[0,479,14603,20480],"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}