Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i'd love to have the hat and book please YOU: can i get the hat and two balls - the book and a ball would be yours THEM: i really need that hat. i can go the other way, the hat and a ball YOU: nah, i can live with the first offer - a balls for me, the hat and book for you THEM: ok deal YOU: deal.
Output:
Yes