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.
Q: Context: 'It will be. And I'm grateful that you recognize the need! Will you do me a solid by permitting me to have these provisions?' 'I can give you 3 firewood, but only 1 food and no water.' 'Good gravy! I will need to cancel the expedition if that's all you have to spare. Can you surely do no better?'
Utterance: 'I do like to have lots of water because I get thirsty on some of my longer hikes. How about I give you 3 firewood, 1 food and 1 water?'
A: 
No