Complex sentence: He is closely affiliated with Sean Sherk & Brock Lesnar of the Minnesota Martial Arts Academy Erik recently came out of retirement in October 2007 to headline the first HDNET MMA fight card.
Split into simpler sentences: He is closely affiliated with Sean Sherk and Brock Lesnar of the Minnesota Martial Arts Academy. Erik came out of retirement in October 2007 to headline the first HDNET MMA fight card.