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: Which Taco Bell?

SOLUTION: Yes

PROBLEM: Eh, I've heard the food isn't too great there. How about something else?

SOLUTION: Yes

PROBLEM: What are you in the mood for: Mexican, Chinese, or something else?

SOLUTION:
Yes