Complex sentence: In October 1974, an intoxicated Mills ran his car into the Washington Tidal Basin while he was in the company, not of his wife, but Anna Battistella, an exotic dancer who used the alias "Fanne Foxe" or the "Argentine Firecracker".
Split into simpler sentences: In October 1974, an intoxicated Mills ran his car into the Washington Tidal Basin. Mills was in the company, not of his wife, but by Anna Battistella, an exotic dancer who used the alias "Fanne Foxe" or the "Argentine Firecracker".