ใครคือผู้ชนะในรอบ wanneroo park Circuit?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
Who is the round winner of the wanneroo park circuit?It is not neccessary to use all the tables.
 table_19886463_1:  (round_winner [ VARCHAR ] circuit [ VARCHAR) ]
SELECT round_winner FROM table_19886463_1 WHERE circuit = "Wanneroo Park"