CREATE TABLE table_80019 ("Sport" CLOB, "League" CLOB, "Tier" CLOB, "Club" CLOB, "Stadium" CLOB)

Which tier is for football at Tianhe Stadium?
SELECT "Tier" FROM table_80019 WHERE "Sport" = 'football' AND "Stadium" = 'tianhe stadium'
SELECT "Tier" FROM "table_80019" WHERE "Sport" = 'football' AND "Stadium" = 'tianhe stadium'