TASK DEFINITION: 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.
PROBLEM: Mrs . Sue ? Yes ? Mr . Brown will have to call you back in a little while . All right . But tell him I will only be here until four o'clock .

SOLUTION: Yes

PROBLEM: I'll treat you dinner . Don't be silly . Let's go Dutch .

SOLUTION: No

PROBLEM: Shall we buy ? It really depends on you . But if you were me ? If I were you , I'd buy .

SOLUTION:
Yes