Complex sentence: The St. Mary High School Ramblers competed in the Hudson County Interscholastic Athletic Association, which includes public and private high schools in Hudson County, which operated under the supervision of the New Jersey State Interscholastic Athletic Association.
Split into simpler sentences: The St. Mary High School Ramblers compete in the Hudson County Interscholastic Athletic Association, which includes public and private high schools in Hudson County. The league operates under the supervision of the New Jersey State Interscholastic Athletic Association.