Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i think you would look good in those hats if i get the rest YOU: only if i can get the books as well THEM: the ball is a good start, but i need two more items on top of it YOU: the books and the hats are worth the same as the ball alone, this way we would be even THEM: they are worth different amounts to both of us, that's the point.
Output:
No