{"id":"S99000138","label":"Sodium hydride","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh99000138","normalized_label":"sodium hydride","broader":["http://id.loc.gov/authorities/subjects/sh85063361","http://id.loc.gov/authorities/subjects/sh85124260"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh99000138","provider":"lcsh","revision":"b1486bb5a2c3f322","taxonomy_revision":"f050b5d4780b1289","title":"Sodium hydride","url":"/topics/S99000138","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4649052096535348774","address_version":"morton4x16-v1","coordinates":[0,23,39549,10240],"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}