Complex sentence: Continental Band, American Band, and Rambler Band offer opportunities for novice and intermediate musicians whereas the Band of the Black Watch is the jewel of the high school band program, bringing together musicians from all of Kenosha's high schools.
Split into simpler sentences: Continental Band, American Band, and Rambler Band offer opportunities for novice and intermediate musicians. The Band of the Black Watch brings together musicians from all of Kenosha's high schools.