CREATE TABLE table_79144 ("Date" TEXT, "Bowl Game" TEXT, "Big Ten Team" TEXT, "Opp. Team" TEXT, "Score" TEXT)

Who was Purdue's opponent?
SELECT "Opp. Team" FROM table_79144 WHERE "Big Ten Team" = 'purdue'
SELECT "Opp. Team" FROM "table_79144" WHERE "Big Ten Team" = 'purdue'