Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: hi, i'd love either the hat and the ball and all the books.  YOU: you can have the books if i can have the hat and the ball  THEM: how about i get 2 books and either the hat or the ball?  YOU: you can have one book and the ball  THEM: no, that won't work.  YOU: ok then you can have the ball and 2 book  THEM: ok deal thanks.
Output:
Yes