{"id":"S93009401","label":"Demand controlled ventilation systems","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh93009401","normalized_label":"demand controlled ventilation systems","broader":["http://id.loc.gov/authorities/subjects/sh85142747"],"aliases":["DCV systems (Ventilation)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh93009401","provider":"lcsh","revision":"a215fbf2af0a650e","taxonomy_revision":"f050b5d4780b1289","title":"Demand controlled ventilation systems","url":"/topics/S93009401","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9853959548711601764","address_version":"morton4x16-v1","coordinates":[0,22,11479,58368],"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}