prompt: Who started McDonald's restaurant and in what year?
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: Who started McDonald's restaurant and in what year?
chosen.role: assistant
chosen.content: In 1940, brothers Maurice ("Mac") and Richard McDonald launched the first McDonald's restaurant in San Bernardino, California. 
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: Who started McDonald's restaurant and in what year?
rejected.role: assistant