Ken Wharton ไปกี่รอบ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many rounds did Ken Wharton go?It is not neccessary to use all the tables.
 table_name_64:  (rounds [ VARCHAR ] driver [ VARCHAR) ]
SELECT rounds FROM table_name_64 WHERE driver = "ken wharton"