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.

Positive Example 1 -
Input: I am feeling hungry so I would like to find a place to eat.
Output: No

Positive Example 2 -
Input: Do you have a specific which you want the eating place to be located at?
Output: Yes

Negative Example 1 -
Input: Is there some other restaurant which you can suggest?
Output: No

Negative Example 2 -
Input: Can you please confirm that you want to book a table for 2 at 11:30 am at the Bird Dog restaurant in Palo Alto for today.
Output: No

Now complete the following example -
Input: Yes, do they serve liquor?
Output: 


Output: Yes