Complex sentence: The American Wind Symphony Orchestra (AWSO; also called the American Wind Symphony, abbreviated AWS) is an American musical ensemble comprising the wind instruments found in a symphony orchestra, which is dedicated to the performance of contemporary classical music.
Split into simpler sentences: The American Wind Symphony Orchestra (AWSO; also called the American Wind Symphony, abbreviated AWS) is a musical ensemble comprised of the wind instruments found in a symphony orchestra. The AWSO is dedicated to the performance of contemporary classical music.