{"id":"S2021001481","label":"Dams--Drainage systems","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2021001481","normalized_label":"dams--drainage systems","broader":["http://id.loc.gov/authorities/subjects/sh85039296"],"aliases":["Dam drainage systems","Drainage systems of dams"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2021001481","provider":"lcsh","revision":"4a934c5f3a8f0c93","taxonomy_revision":"f050b5d4780b1289","title":"Dams--Drainage systems","url":"/topics/S2021001481","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4937150265508758530","address_version":"morton4x16-v1","coordinates":[0,481,55332,9216],"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}