Complex sentence: She has been on the national team for ten years and her favorite event is Trampoline and was the National Trampoline Champion of 2004 and also has won a number of Trampoline events over the years.
Split into simpler sentences: She has been on the national team for ten years, her favorite event is trampoline. She was the National Trampoline Champion of 2004 and also has won a number of other trampoline events over the years.