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: Yes. What's their phone number?

A: Yes
****
Q: No. I need to observe it with subtitles. I need to observe The Aftermath.

A: No
****
Q: Sound great. What is their contact number? Do you know if they serve liquor?

A:
Yes
****