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: 'I also need water because we plan to do a lot of hiking. What about you?' 'Wow, I think we planned the same activities for our trip. I need water too 🙂' 'Haha well we'll be seeing a lot of each other then. Is water your number one or two priority?'
Utterance: 'Water is my second priority item. I am sure we can work out a fair deal. What do you propose?'
[EX A]: Yes

[EX Q]: Context: 'ah, I'm definitely ok with doing one at a time: A 2:1 split is definitely OK with me: The issue is, if we consider each individually, it might be harder to come to a deal, but I'm happy to do it your way.' 'How about you take 1 firewood, I''l take 2 and with food, you can have 2 and I'll take one package.  I have two very hungry boys!' 'Is there a reason you want the 2:1 split? Food my group's largest priority by a large margin (We eat a lot). It's worth a lot more to my group then the firewood would be.'
Utterance: 'That's why I would like to give you 2 and I will take 1 food.  I have 8 and 10 year old boys.🙂'
[EX A]: Yes

[EX Q]: Context: 'Same here! I am in need of food more than firewood however as I am very hungry. ' 'Me too. We have a bigger family and we will run out of food if we don't get some more.' 'Since it looks like we have the same value ranking for our needs, how would you like to try to make the deal?'
Utterance: 'Well let's try to make this as fair as possible.🙂We could get 2 packages of food, leaving you with 2 extra packages of firewood as well as water.'
[EX A]:
Yes