Determine whether there has been any questions asked by the speaker in the dialogue or not. If there has been a question in the dialogue then the output Yes otherwise output No.

[EX Q]: Let's eat out . Why not ?
[EX A]: No

[EX Q]: Hi ! This is John Li , is my car fixed yet ? Let me run and check .
[EX A]: Yes

[EX Q]: I'd like to talk to Mr . White please ? He stepped out of the office for a little while . When is a good time to catch him ? In about twenty minutes .
[EX A]:
Yes