Instructions: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i would like both books and both hats.  YOU: i'd take the ball and one book.  THEM: sorry i can't give up any books on my side.  YOU: ok. i'll take the ball and two hats.  THEM: deal.
Output:
Yes