prompt: When was the "Lincoln Head" penny introduced?
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: When was the "Lincoln Head" penny introduced?
chosen.role: assistant
chosen.content: The Lincoln Head penny was first introduced by the U.S. Mint in 1909. Abraham Lincoln was the first real person to appear on U.S. circulating coins. While the Lincoln portrait has remained the same since, several different designs have been used on the reverse side of the penny including Ears of Wheat between the years of 1909 and 1958. 
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: When was the "Lincoln Head" penny introduced?
rejected.role: assistant