Complex sentence: South Dakota State has some of the best athletic facilities in the Summit League, Missouri Valley Football Conference, as well as the region and even some of the university's venues compete as some of the finest in the nation (SJAC).
Split into simpler sentences: South Dakota State has some of the best athletic facilities in their region, The Summit League, and the Missouri Valley Football Conference. Some of the university's venues compete as some of the finest in the nation (SJAC).