Complex sentence: Haircut 100 released just one album, "Pelican West" (1982), which spawned a string of hit singles, before Heyward quit to pursue a solo career in 1983.
Split into simpler sentences: Haircut 100 released just one album with Heyward, "Pelican West" (1982), which spawned a string of hit singles. He then quit to pursue a solo career in 1983.