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.

[EX Q]: Context: 
Utterance: 'Ireall would like the water as I forgot to bring it and would not be able to survive without it'
[EX A]: No

[EX Q]: Context: 'I'm thinking I'l get 2 firewood, and 2 water and 1 food. I'm not sure what you need, but we can figure it out. ' 'my highest priority is water, i need it to stay hydrated from the camping beers' 'Who doesn't? I need more wood. I'm skinny. I get cold easily. Beer hidrates dude 🙂'
Utterance: 'ha no prob on the wood, its out there in nature so i can do with less of it hows 3 water, 1 food, 0 wood sound'
[EX A]: No

[EX Q]: Context: 'Well you can take all the firewood if it will help, would it be ok if i get all the food in return?' 'That works for me. How would you like to divide the water?' 'I am ok with you taking two waters since you are new to camping, does that seem fair to you?'
Utterance: 'Yes, that seems fair to me.'
[EX A]:
Yes