Complex sentence: He became the first swimmer to represent his country South Africa in international tournaments, while playing for the Penn State Nittany Lions in his senior season, and held a dual citizenship between South Africa and the United States.
Split into simpler sentences: He became the first swimmer to represent his country South Africa in international tournaments, while playing for the Penn State Nittany Lions in his senior season. He also holds a dual citizenship between South Africa and the United States.