Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: if i can have the balls and the hat you can have the book  YOU: i need hat and book  THEM: would you be willing to accept one or the other?  YOU: gimme hat and a ball  THEM: okay if that is the best you can do. deal.
Output:
No