Complex sentence: He attended the now-defunct DuPont High School in Belle, where he played high school basketball for the DuPont Panthers in 1994, and led his high school team to the state championship before being defeated in the final.
Split into simpler sentences: He attended the now-defunct DuPont High School in Belle, where he played high school basketball for the DuPont Panthers. In 1994, and led his high school team to the state championship before being defeated in the final.