TASK DEFINITION: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
PROBLEM: THEM: i'd like three hats and the book. YOU: i can do three hats but i need reast THEM: hmm. that doesn't work for me. i'll take a basketball and two hats instead. YOU: deal.

SOLUTION: Yes

PROBLEM: THEM: i would like the books, you can have the rest. YOU: hmmmmm THEM: or i can take just one book, i don't need the other stuff. YOU: ok deal.

SOLUTION: Yes

PROBLEM: THEM: 4 books for a hat and a ball? YOU: four books for hat.

SOLUTION:
No