Complex sentence: While in Napalm Death, Harris also played drums for Doom and Extreme Noise Terror, and participated in a side project with Mitch Harris called Defecation, which produced one record, "Purity Dilution", through Nuclear Blast.
Split into simpler sentences: While in Napalm Death, Harris also played drums for Doom and Extreme Noise Terror. Also while in Napalm Death, Harris participated in a side project with Mitch Harris called Defecation, which produced one record, "Purity Dilution", through Nuclear Blast.