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.

[EX Q]: Would you prefer Mexican, Chinese, or something else?
[EX A]: Yes

[EX Q]: Do they serve alcohol? And what's their phone number?
[EX A]: Yes

[EX Q]: Thank you, that's it.
[EX A]:
No