instruction:
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.
question:
Context: 'Hm. Getting warmer. What do you need the most of? ' 'I need more water than the other options, you can keep 2 food and 2 firewood but 1 water' 'I also feel that water is the most important. How about I take all 3 water, and you can take 2 firewood, and 2 foods?'
Utterance: 'I think the fairest thing would be that you keep 1 water, 2 food, 2 firewood'
answer:
Yes


question:
Context: 
Utterance: 'Hello'
answer:
No


question:
Context: 'That's very smart! 🙂 Way to be prepared! I didn't think to do that.' 'So if we were to split the firewood more in your favor and I were to take all the food, and then we kind of split the water, I think we could maybe make a deal here?  🙂' 'I think that is definitely doable! I'd be glad to make a deal with you. Thanks for being so reasonable! 🙂🙂'
Utterance: 'So I'm proposing 1 firewood to me, 2 to you.  3 food to me.  And 2 water to me, 1 to you.  Can we work with that?  Firewood seems to be important to the both of us so I'm giving up things here.'
answer:

Yes