Complex sentence: Lourdes is a class D-1 school according to the Nebraska Scholastic Activities Association (NSAA) and is comprised mostly of students from the nine supporting Catholic parishes, but also including students from other faith traditions.
Split into simpler sentences: Lourdes is a class D-1 school according to the Nebraska Scholastic Activities Association (NSAA). Its students are mostly from the nine supporting Catholic parishes, but also from other faith traditions.