Complex sentence: Mondelli has been a guest instructor and coach at The Pit (mixed martial arts), a martial arts and MMA camp started by John Hackleman in 1986, and which has produced several prominent fighters such as Chuck Liddell and Glover Teixeira among others.
Split into simpler sentences: Mondelli has been a guest instructor and coach at The Pit (mixed martial arts), a martial arts and MMA camp started by John Hackleman in 1986. The prominent camp has produced several prominent fighters such as Chuck Liddell and Glover Teixeira among others.