Complex sentence: Harrison also composed the scores for the "Creepshow" (1982), "Day of the Dead" (1985) as well as playing the "Screwdriver Zombie" in Romero's classic "Dawn of the Dead" (1978).
Split into simpler sentences: Harrison also composed the scores for the "Creepshow" (1982), "Day of the Dead" (1985). He also played the "Screwdriver Zombie" in Romero's classic "Dawn of the Dead" (1978).