Winfield Triple Challenge series จัดขึ้นวันไหน?ไม่จำเป็นต้องใช้ตารางทั้งหมด
On which date did the Winfield Triple Challenge series take place?It is not neccessary to use all the tables.
 table_name_61:  (date [ VARCHAR ] series [ VARCHAR) ]
SELECT date FROM table_name_61 WHERE series = "winfield triple challenge"