วงจรรอบ 4 อยู่ไหน?ไม่จำเป็นต้องใช้ทุกโต๊ะ
Where was the circuit for round 4?It is not neccessary to use all the tables.
 table_25213146_2:  (circuit [ VARCHAR ] round [ VARCHAR) ]
SELECT circuit FROM table_25213146_2 WHERE round = 4