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]: What's their phone number?
[A]: Yes


[Q]: I want to make a reservation at a restaurant for 17:00.
[A]: No


[Q]: Can you tell me the phone number which I can use to contact them?
[A]:
Yes