Complex sentence: On September 12,2012, New Mexico State announced that it will stay in the Football Bowl Subdivision (FBS) and become an independent, after the WAC will transition to a non-football playing Division I conference after the 2012 season.
Split into simpler sentences: On September 12,2012, New Mexico State announced that it will stay in the Football Bowl Subdivision (FBS) and become an independent. The WAC will transition to a non-football playing Division I conference after the 2012 season.