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?
[A]: Yes


[Q]: Yes that is perfect. What is the address and phone number?
[A]: Yes


[Q]: Please confirm. You want to watch The Invisibles without subtitles.
[A]:
No