prompt: When did food first start to be pickled?
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: When did food first start to be pickled?
chosen.role: assistant
chosen.content: Using vinegar, brine or a similar solution to preserve food is one of the oldest known methods. While it is impossible to pinpoint the first instance of pickling, archaeologists believe it goes as far back as 2400 B.C. in ancient Mesopotamia. We do know, however, that in the Tigris Valley, native Indian cucumbers were being pickled a few centuries later. 
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: When did food first start to be pickled?
rejected.role: assistant