Complex sentence: However, UFC 68 still holds the highest attendance for a MMA event in the United States with just over 19,000 people in attendance, along with the highest attendance for a MMA event outside of Canada and Japan.
Split into simpler sentences: However, UFC 68 still holds the highest attendance for a MMA event in the United States with just over 19,000 people in attendance. Along with the highest attendance for a MMA event outside of Canada and Japan.