Definition: 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.
Input: Context: 'I can give you 1 thing of water and 2 things of firewood' 'Hmmm. So you will end up with 1 firewood, 3 food, and 2 water?  I think I need 1 more water and 1 more food. ' 'I'll give you another water and food'
Utterance: 'I think we have a deal.  To confirm, YOU get 1 firewood, 2 food, and 1 water?  If yes, please confirm.  I think this sounds fair.'

Yes