 Complete the following phrase:  Competing at his first IAAF World Indoor Championships, he finished seventh in the final of the 1500 m. After this he decided that he would not succeed over distance and permanently switched to the 5000 m, saying: Thats enough for the 1500. It was tried, it didnt work. Returning to the cross country championships, he improved to win the team silver at the 2001 edition, although he finished tenth overall. He finished eighth in the 5000 m at the 