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]: My battery's flat in my mobile . Is that why you didn't return my call ? And I couldn't find another phone . That's okay .
[EX A]: Yes

[EX Q]: Could you do me a favor ? It depends .
[EX A]: No

[EX Q]: I'm freezing . Turn down the air conditioner , will you ? But then it'll be too warm . Not if you take off your jacket .
[EX A]:
No