The input is taken from a negotiation between two participants who take the role of campsite neighbors and negotiate for Food, Water, and Firewood packages, based on their individual preferences and requirements. Given an utterance and recent dialogue context containing past 3 utterances (wherever available), output Yes if the utterance contains the vouch-fair strategy, otherwise output No. vouch-fair is a selfish negotiation strategy. It is used to call out fairness for personal benefit, either when acknowledging a fair deal or when the opponent offers a deal that benefits them. This can be through an explicit call out or can be implied.

Input: Consider Input: Context: 'how about i get 1 water, 2 food, and 2 firewood since I'll be here so long? because of my leg i likely won't be able to leave anytime soon' 'What about I give you more food in exchange for you giving me more water? I could give you 2 food and you give me an extra water?' 'unfortunately that doesnt work for me. i am afraid i will not be able to discuss this any further my final offer is i get 2water 2food and 1wood'
Utterance: 'can we meet in the middle? if we cannot come to an agreement we both get nothing and we both lose. i am in dire need of the water to keep my leg from having to be amputated. i have children at home i take care of and i can't live without my leg'

Output: Yes


Input: Consider Input: Context: 'Of course. So, what about food? I will definitely need the food. I have a big family, and we all need to eat. I can't have people starving. Can I take all of the food?' 'Okay I accept that.' 'Wonderful. And what about the firewood? I would like 2 firewood, and I can give you 1 firewood. Will you accept that?'
Utterance: 'Okay I accept your deal.'

Output: No


Input: Consider Input: Context: 'I like your plan.  It is simple. I will agree to that.' 'So all that is left is water, i guess i should atleast drink alot of it if i wont eat much haha 🙂' 'For sure, and you will need some way to put out the fire. 😮'
Utterance: 'Haha good point, you worked with me on the firewood so i am ok with you getting two waters and i will get one, deal?'


Output: No