Complex sentence: Sold-out shows with the Libertines and Ted Leo and the Pharmacists followed that same year; before the year's end, the Lashes joined producer John Goodmanson (Sleater-Kinney, Unwound, Harvey Danger) for the recording of their debut album.
Split into simpler sentences: Sold-out shows with The Libertines and Ted Leo and the Pharmacists followed that same year. Before the year's end, the Lashes joined producer John Goodmanson for the recording of their debut album.