Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i would like the hat and 4 balls  YOU: how about i get the hat, and you get everything else?  THEM: i need the hat and balls  YOU: that's 5 objects to one.  THEM: ok i will take all 4 balls and you get the hat and book?  YOU: ok  THEM: great deal.
Output:
Yes