{"id":"S85013028","label":"Bell X-1 (Supersonic plane)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85013028","normalized_label":"bell x-1 (supersonic plane)","broader":["http://id.loc.gov/authorities/subjects/sh2009008725","http://id.loc.gov/authorities/subjects/sh85114714","http://id.loc.gov/authorities/subjects/sh85130652"],"aliases":["Bell X-1 (Supersonic planes)","Bell XS-1 (Supersonic plane)","X-1 (Bell supersonic plane)","XS-1 (Supersonic plane)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85013028","provider":"lcsh","revision":"86d1131636275691","taxonomy_revision":"f050b5d4780b1289","title":"Bell X-1 (Supersonic plane)","url":"/topics/S85013028","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9513858612007682560","address_version":"morton4x16-v1","coordinates":[0,20,17608,36864],"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}