CREATE TABLE table_79143 ("Date" CLOB, "Bowl Game" CLOB, "Big Ten Team" CLOB, "Opp. Team" CLOB, "Score" CLOB)

Who was the opposing team in the game with a score of 21-17?
SELECT "Opp. Team" FROM table_79143 WHERE "Score" = '21-17'
SELECT "Opp. Team" FROM "table_79143" WHERE "Score" = '21-17'