Complex sentence: Some notable exponents of this style of brass band include the Rebirth Brass Band, the Soul Rebels Brass Band, Youngblood Brass Band and the Dirty Dozen Brass Band, though a number of groups outside the United States have begun playing this style of music.
Split into simpler sentences: Some notable exponents of this style of brass band include the Rebirth Brass Band, the Soul Rebels Brass Band, Youngblood Brass Band and the Dirty Dozen Brass Band. Also, a number of groups outside the United States have begun playing this style of music.