Complex sentence: The Mount Saint Dominic Academy Lady Lions compete in the Super Essex Conference an athletic conference of private and public high schools located in Essex, operating under the supervision of the New Jersey State Interscholastic Athletic Association (NJSIAA).
Split into simpler sentences: The Mount Saint Dominic Academy Lady Lions compete in the Super Essex Conference an athletic conference of private and public high schools located in Essex. The league operates under the supervision of the New Jersey State Interscholastic Athletic Association (NJSIAA).