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 would have been able to bring more with me by getting some from my parents, but my father decided he wanted to get rid of what he had left and so has been enjoying his fire pit a lot lately.' 'Oh I have always wanted a firepit! I totally understand. If you'd like you can have all 3 of the firewood supply stash to get you started.' 'And I think it's entirely reasonable for you to have all 3 of the water as dehydration can be very bad very quickly, especially with diabetes.'
Utterance: 'That sounds like a fair deal. Food wise, how would you like to split that up?'

Yes