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]: I can't find my keys . Where did you See then last ?
[EX A]: Yes

[EX Q]: Where did this come from ? I have no idea .
[EX A]: Yes

[EX Q]: That'll be eight dollars , please . Here's ten . Keep the change .
[EX A]:
No