Complex sentence: In 2007, men's lacrosse defeated University of Virginia, ranked number one at the time and the defending National Champion, Drexel's first victory over a number one ranked Division I team in any sport.
Split into simpler sentences: In 2007, men's lacrosse defeated University of Virginia, ranked number one at the time and the defending National Champion. This was Drexel's first victory over a number one ranked Division I team in any sport.