Complex sentence: The Washington, D.C. emo scene lasted only a few years, and by 1986 most of its major bands (including Rites of Spring, Embrace, Gray Matter and Beefeater) had broken up.
Split into simpler sentences: The Washington, D.C. emo scene lasted only a few years. By 1986, most of the major bands of the movement--including Rites of Spring, Embrace, Gray Matter, and Beefeater--had broken up.