Complex sentence: Greg Warren attended Southern Wayne High School in Dudley, North Carolina, he was a four-year letterman in football, a three-year letterman in track & field, and a member of the National Honor Society.
Split into simpler sentences: Greg Warren attended Southern Wayne High School in Dudley, North Carolina. He was a four-year letterman in football, a three-year letterman in track & field, and a member of the National Honor Society.