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.

Example Input: Do they serve liquor there?
Example Output: Yes

Example Input: Do you know if they have live music? Also, please give me their number.
Example Output: Yes

Example Input: I changed my mind. I would rather watch Innocent.
Example Output:
No