Complex sentence: The first chorus of an arrangement typically introduces the melody, and is followed by subsequent choruses of development, which may take the form of improvised solos, written "soli" sections, and "shout choruses".
Split into simpler sentences: The first chorus of an arrangement typically introduces the melody, and is followed by subsequent choruses of development. This development may take the form of improvised solos, written "soli" sections, and "shout choruses".