Complex sentence: During the late 1980's and the early 1990's, the area where the building was located became increasingly crime-ridden and dangerous, but was still used as a rehearsal studio for such bands as Guns N Roses and White Zombie.
Split into simpler sentences: During the late 1980's and the early 1990's, the area where the building was located became increasingly crime-ridden and dangerous. It was used as a rehearsal studio for such bands as Guns N Roses and White Zombie.