Complex sentence: Track and field is categorised under the umbrella sport of athletics, which also includes road running, cross country running, and sprints, middle-and long-distance events, race walking and hurdling, are won by the athlete with the fastest time.
Split into simpler sentences: Track and field is categorised under the umbrella sport of athletics, which also includes road running, cross country running, and race walking. The foot racing events, which include sprints, middle-and long-distance events, race walking and hurdling, are won by the athlete with the fastest time.