{"id":"S88007034","label":"Slow wave sleep","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh88007034","normalized_label":"slow wave sleep","broader":["http://id.loc.gov/authorities/subjects/sh85123401"],"aliases":["Sleep stage IV","Sleep stage four","Stage IV sleep","Stage four sleep"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh88007034","provider":"lcsh","revision":"3b9ad5bc3fd84db6","taxonomy_revision":"f050b5d4780b1289","title":"Slow wave sleep","url":"/topics/S88007034","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14755129678536771076","address_version":"morton4x16-v1","coordinates":[0,20,64389,59392],"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}