Complex sentence: Undisputed was a mixed martial arts event held by the Ultimate Fighting Championship at the Mandalay Bay Events Center in Las Vegas, Nevada and broadcasted live on pay-per-view in the United States, on September 26,2003.
Split into simpler sentences: Undisputed was a mixed martial arts event held by the Ultimate Fighting Championship. It took place at the Mandalay Bay Events Center in Las Vegas, Nevada and broadcasted live on pay-per-view in the United States, on September 26,2003.