Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: hello there. if i can have both the books, the rest can be yours.  YOU: nah. i want both books and the ball.  THEM: i don't really care for the ball. i'd really like both books badly.  YOU: i want both books and the ball. you get the bonus either way, you do realize that, right?  THEM: i'll give you one book, i'll take the ball, you can have the rest.  YOU: ok, this isn't going to work for me  THEM: i can't give both books. i can give you one book and the rest if you must insist.  YOU: fine  THEM: ok.
Output:
No