Complex sentence: The Chattanooga Rugby Football Club, which was established in 1978 and the 2011 and 2013 DII Mid South champions, is affiliated with USA Rugby and USA Rugby South.
Split into simpler sentences: The Chattanooga Rugby Football Club, which was established in 1978. The club, the 2011 and 2013 D2 Mid South champions, is affiliated with USA Rugby and USA Rugby South.