Complex sentence: American had several sub-labels over the years, including Onion Records, Ill Labels, Wild West, Whte Lbls ("sic"), and Infinite Zero, the latter of which was a partnership with Henry Rollins that specialized in reissues of obscure albums.
Split into simpler sentences: American had several sub-labels over the years, including Onion Records, Ill Labels, Wild West, Whte Lbls ("sic"), and Infinite Zero. The latter was a partnership with Henry Rollins that specialized in reissues of obscure albums.