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: 'Ah, that doesn't work for me. I would need to have at least one water because one of mine has a leak (and I have an extra person joining me).' 'I guess you can have one. That gives me 2 firewood and 2 waters, and you 1 firewood, 1 water, and 3 food. Right?' 'Yes that would work for me. But I would also let you have all the firewood if I got 2 waters and all the food. '
Utterance: 'You didn't give me any of the food☹️'

No