You are given a sentence from a conversation between a human and a virtual assistant. Your task is to identify whether the sentence is a question or not. Answer with Yes or No.

Q: Do they serve liquor? What is the address of the restaurant.

A: Yes
****
Q: I'd like my reservation to be in San Jose, and at morning 11.

A: No
****
Q: Whether they serve liquor?

A:
Yes
****