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.

[Q]: Context: 'I understand your preferences. If I take all of the water, 1 firewood, and 2 food your family will still have the opportunity to have a good camping trip and I can learn to survive on this trip. Please consider my request again.☹️' 'Ok - you're not being reasonable at all.  If you're so incompetent at going camping, maybe you should stay home and I can take all the supplies. How's that for an excellent offer?  All for me and 0 for you.' 'I think it would be good to come to a compromise. If I take all of the water and have the 2 foods, you can take all of the firewood as you originally proposed. Yet, I will have a tough time learning how to survive on a camping trip.😡'
Utterance: 'Again, that's not a fair compromise....You get all of what we both we want and more of another item.  Let me state it to you clearly so you can understand.  I WILL NOT ACCEPT THAT OFFER.  There is no chance you are getting all the water now that I think about it.  I will offer I get 1 water, 2 firewood, and 2 food.  If you can't come up with a reasonable offer, I will just walk away and we both get nothing.  I will survive because I will have skills.'
[A]: Yes


[Q]: Context: 'no then u have to give 3 food for me' 'I can have two food then and one wood and you can have the rest of the items' 'bro make it 3 food for me, u can take 3 fire wood  give me to water'
Utterance: 'you are not being fair, bare in mind we have same priority, so if you take all the food you have to give me the wood and water, or you can take all the wood and water and give me the food'
[A]: Yes


[Q]: Context: 'Who is willing to cooperate in a consensual offer so that we can all get fruitful dividends😡' '😮 What is your offer then? ' '2 of water, plus 2 of food and 0 of firewood'
Utterance: 'That doesn't seem totally fair. How about I take 2 water instead? '
[A]:
Yes