สนามกีฬา mcmahon ก่อตั้งเมื่อปีใด?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
What year was mcmahon stadium founded?It is not neccessary to use all the tables.
 table_27599216_6:  (founded [ INTEGER ] football_stadium [ VARCHAR) ]
SELECT MAX(founded) FROM table_27599216_6 WHERE football_stadium = "McMahon Stadium"