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: 'That's a good reason! I don't run, but could use some water. ' 'How much were you thinking? I could also use some food, but really don't have much need for firewood.' 'How about we split? 2 water for you, and 1 for us, that way we can go on a fun hike. In exchange, could we also have all the firewood? We want to have a community fire and you're more than welcome!'
Utterance: 'So 2 waters for me, 1 for you, and all the fire wood. How about the food? Perhaps 1 for me and 2 for you? Sound reasonable?'

Yes