Complex sentence: Near the end of his life, Sutton did commercial art for New England ad agencies, and, under the pseudonym "Dementia", drew for Fantagraphics' Eros Comix line of pornographic comics.
Split into simpler sentences: Near the end of his life, Sutton did commercial art for New England ad agencies. Under the pseudonym "Dementia", he drew for Fantagraphics' Eros Comix line of pornographic comics.