Given the task definition, example input & output, solve the new input case.
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: I am feeling hungry so I would like to find a place to eat.
Output: No
The user is informing the intent, but not asking any question here

New input case for you: Yes. What's their phone number?
Output:
Yes