ฟุตบอลที่สนามกีฬาเทียนเหอคือระดับใด?ไม่จำเป็นต้องใช้ทุกโต๊ะ
Which tier is for football at Tianhe Stadium?It is not neccessary to use all the tables.
 table_80019:  "Sport" [ text]  "League" [ text]  "Tier" [ text]  "Club" [ text]  "Stadium" [ text] 
SELECT "Tier" FROM table_80019 WHERE "Sport" = 'football' AND "Stadium" = 'tianhe stadium'