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: 'We will be in an area where there is not much firewood to collect. You have to bring it in.  We hope to cook with it and keep warm in the evenings.  I am hoping to take at least 2 firewood packages.' 'I will give you water. Firewood also need for me because of my health condition i want some warm.' 'Will one extra firewood be enough to keep you warm?'
Utterance: 'I'm not sure why you entered a deal we did not agree on.  I can leave you the three food and one firewood.'
[EX A]: No

[EX Q]: Context: 'My main objective for the camp is food and firewood, since I have a large family and the amount of food they give in the camp is very small for all my family and my wife and I have to cook with firewood in the camp.' 'I understand completely. I would like to have all three water, and I'm only traveling with just me, so how about 1 firewood? The rest for you.' 'No me gusta mucho el trato, pero para eso debemos hablar y decidir como adultos un buen trato para los dos. Lo que queremos es disfrutar en el campamento.'
Utterance: 'I do not understand spanish. Please speak to me in English.'
[EX A]: No

[EX Q]: Context: 'yes ofcourse i agree with you.my dear friend will you have 1 food 3 firewood and 3 water' 'I would prefer 2 food and less firewood. There is tons of firewood where I am but there is no lake so I can't fish. No berries around here either. It's pretty scarce' 'okay is 2 food 1 firewood okay for you while i get 1 food 2 firewood and 3 water'
Utterance: 'I'm going to need some water as well. How about 2 food, 2 water and 0 firewood for me?'
[EX A]:
No