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 Input:
It's a restaurant called Yum Yum, and it's for six pm.

Ex Output:
No

Ex Input:
Sorry, the reservation was unsuccessful. What else may I do for you?

Ex Output:
No

Ex Input:
Where are they located? And do they serve liquor?

Ex Output:
Yes