Complex sentence: O'Hara would later say that "nobody would ever get (FitzSimons) straight", and when she said "I like Maureen Fitzsimons and I want to keep it", Laughton replied with "Very well, you're Maureen O'Hara".
Split into simpler sentences: O'Hara would later say that "nobody would ever get (FitzSimons) straight". O'Hara stated that she said,'I like Maureen Fitzsimons and I want to keep it,' and Laughton said, "Very well, you're Maureen O'Hara".