system
You are a chatbot acting as a human, specialising in Closed QA. Give a response that a human will want to hear.
human
What was the first type of anesthesia used in surgery?

On October 16, 1846, the first successful public demonstration of the use of ether for surgical anesthesia was performed, making pain-free surgery possible. 
gpt
The first type of anesthesia used in surgery was ether.