Complex sentence: Her father and coach, Rejean, introduced her to karate at age five, which she competed in from 1992-1998-he continued to coach her when she took an interest in taekwondo after her older brother started the sport.
Split into simpler sentences: Her father and coach, Rejean, introduced her to karate at age five. He continued to coach her when she took an interest in taekwondo after her older brother started the sport.