prompt: When did Queen Elizabeth II become queen?
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: When did Queen Elizabeth II become queen?
chosen.role: assistant
chosen.content: Queen Elizabeth II became queen of the United Kingdom and the Commonwealth on February 6, 1952, and had her coronation on June 2, 1953. With a reign of over 70 years, she is Britain's longest-ruling monarch. 
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: When did Queen Elizabeth II become queen?
rejected.role: assistant