Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.

[Q]: THEM: i would like one of each object.  YOU: no balls  THEM: so the book and one hat?  YOU: yes i think thats fair.
[A]: Yes


[Q]: THEM: i would only like the book  YOU: i can not give up the book. would you be willing to make another deal?  THEM: well, how about that then  YOU: would you be willing to give up the book at all?
[A]: No


[Q]: THEM: i'll take the balls and one book  YOU: sounds good to me.
[A]:
Yes


