วันไหนที่ Yani ชนะในรอบตัดเชือกเหนือ Yueh-Chyn Huang?ไม่จำเป็นต้องใช้ตารางทั้งหมด
Which date was the event that Yani won in a playoff over Yueh-Chyn Huang?It is not neccessary to use all the tables.
 table_name_55:  (date [ VARCHAR ] margin_of_victory [ VARCHAR ] runner_s__up [ VARCHAR) ]
SELECT date FROM table_name_55 WHERE margin_of_victory = "playoff" AND runner_s__up = "yueh-chyn huang"