TASK DEFINITION: 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.
PROBLEM: Do they serve liquor? What is the address of the restaurant.

SOLUTION: Yes

PROBLEM: Do you have a preferred city and place?

SOLUTION: Yes

PROBLEM: No worries, is there anything else?

SOLUTION:
Yes