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: 'How many food would you like to trade for water?' 'How about 2 Water for 3 food?' 'That sounds like a good deal but I could use some firewood as well. Would you throw one of those in as well?'
Utterance: 'That doesn't seem very fair ☹️. That would be 3 food and 1 firewood for 2 water. That is 4 items exchange for 2.'

Yes