Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: good evening turker. i would quite like the hat and 2 books  YOU: the hats are the only thing of value to me  THEM: well you can have the hat and i'll take the rest then.  YOU: i am sorry i made a typo. i meant that i can only use the books  THEM: oh okay. well do you want the two books then? and i'll take the rest. i'm flexible.  YOU: yes 2 books for me and you get the rest  THEM: deal.
Output:
Yes