Complex sentence: The high school is known for its music program, particularly the Hilliard Darby Marching Band, directed by Joe Burke, Mark Oppenheimer, and Jon Merritt, as well as the Hilliard Darby Symphonic Choir, led by Michael G. Martin.
Split into simpler sentences: The high school is known for its music program, particularly the Hilliard Darby Marching Band, directed by Joe Burke, Mark Oppenheimer, and Jon Merritt. Darby is also well known for their the Hilliard Darby Symphonic Choir, led by Michael G. Martin.