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.

Context: 'It is even worse here and I am not feeling well' 'I am just going to walk away from the deal,  my family can't freeze' 'You can take 1 firewood then'
Utterance: 'C-ya, thanks anyways'
No

Context: 'I brought purification tablets so I can make do with rainwater or river water.  How about you?' 'That's very smart! 🙂 Way to be prepared! I didn't think to do that.' 'So if we were to split the firewood more in your favor and I were to take all the food, and then we kind of split the water, I think we could maybe make a deal here?  🙂'
Utterance: 'I think that is definitely doable! I'd be glad to make a deal with you. Thanks for being so reasonable! 🙂🙂'
Yes

Context: 'Okay, well tell me what you need the least of, if you don't mind.' 'You can have all of the water if you let me have all of the firewood.' 'hmm, here's what I'm willing to do. I will take all the water, one firewood and one food.'
Utterance: 'That doesn't sound fair to me.'

Yes