TASK DEFINITION: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
PROBLEM: THEM: i want hat & 2 books  YOU: if i can have the ball and the hat you can have all four books.  THEM: you can have hat if i have 4 books and ball  YOU: i'll give you the hat but then i need the ball and two books.  THEM: okay.

SOLUTION: Yes

PROBLEM: THEM: if i can have the ball you can have the rest.  YOU: sure, that's fine.

SOLUTION: Yes

PROBLEM: THEM: ill take 1 book 2 hats  YOU: can i have one additional object?  THEM: ok you can have a hat  YOU: so i get one of each?  THEM: yes  YOU: deal.

SOLUTION:
No

