Complex sentence: Dudley Moore attended Cook's memorial service in London in May 1995, and he and Martin Lewis presented a two-night memorial for Cook in Los Angeles the following November, to mark what would have been Cook's 58th birthday.
Split into simpler sentences: Dudley Moore attended Cook's memorial service in London in May 1995. He and Martin Lewis presented a two-night memorial for Cook in Los Angeles the following November to mark what would have been Cook's 58th birthday.