CREATE TABLE table_21011 ("Date" TEXT, "Time" TEXT, "ACC Team" TEXT, "Big Ten Team" TEXT, "Location" TEXT, "Television" TEXT, "Attendance" FLOAT, "Winner" TEXT, "Challenge Leader" TEXT)

Who was the winner when the total attendance was 16597?
SELECT "Winner" FROM table_21011 WHERE "Attendance" = '16597'
SELECT "Winner" FROM "table_21011" WHERE "Attendance" = '16597'