Complex sentence: GZA left Cold Chillin after his debut album Words from the Genius did not achieve the sales target that was anticipated, GZA and Mathematics then took to the road yet again, but this time with the help of GZA's cousins, RZA and Ol Dirty Bastard.
Split into simpler sentences: GZA left Cold Chillin after his debut album Words from the Genius did not achieve the sales target that was anticipated. He and Mathematics took to the road yet again, but this time with the help of GZA's cousins, RZA and Ol' Dirty Bastard.