sentences:  This annex building is located on Brighton Road.The Clifton High School Mustangs compete in over 50 sport programs as part of the Big North Conference, following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association (NJSIAA).With 2,131 students in grades 10-12, the school was classified by the NJSIAA for the 2019-20 school year as Group IV for most athletic competition purposes, which included schools with an enrollment of 1,060 to 5,049 students in that grade range.