Complex sentence: Comité Olímpico de Chile sent a total of 35 athletes to the Games, 21 men and 14 women, to compete in 17 sports; most of them strongly participated in athletics, cycling, fencing, modern pentathlon, shooting, and triathlon.
Split into simpler sentences: Comité Olímpico de Chile sent a total of 35 athletes to the Games, 21 men and 14 women, to compete in 17 sports. Most of these strongly participated in athletics, cycling, fencing, modern pentathlon, shooting, and triathlon.