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: 'Thats great. Do you have any extra firewood you could trade by any chance?' 'Sure, I want to make sure I have one firewood at a minimum. ' 'What would you want in return?'
Utterance: 'I like to eat.  I think extra food is good.  Are you willing to let me have all three food packs? 🙂'
No