มีผู้เข้าร่วมกี่คนเมื่อเกมจัดขึ้นที่ Arrowhead Stadium?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many were in attendance when the game was held in Arrowhead Stadium?It is not neccessary to use all the tables.
 table_17972193_1:  (attendance [ INTEGER ] game_site [ VARCHAR) ]
SELECT MIN(attendance) FROM table_17972193_1 WHERE game_site = "Arrowhead Stadium"