CREATE TABLE table_57939 ("Year" CLOB, "Driver" CLOB, "Constructor" CLOB, "Category" CLOB, "Location" CLOB, "Report" CLOB)

What company constructed the vehicle when the driver shows as not held?
SELECT "Constructor" FROM table_57939 WHERE "Driver" = 'not held'
SELECT "Constructor" FROM "table_57939" WHERE "Driver" = 'not held'