Complex sentence: Their first single, "Electrobix", dealt with gay men's obsessions with working out but proved to be less popular than its B-side, a cover version of Pink Floyd's "Comfortably Numb".
Split into simpler sentences: Their first single, "Electrobix", dealt with gay men's obsessions with working out. The single proved to be less popular than its B-side, a cover version of Pink Floyd's "Comfortably Numb".