21. Four athletes competed in a running race. After the competition, each of them was asked what place they took. The first athlete answered: "I was neither first nor last." The second: "I was not first." The third: "I was first." The fourth: "I was last." Only three of these answers were correct. Who lied? Who took the first place?
21. The fourth one told a lie. The first place was taken by the third athlete.