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: 'Hello, how are you?' 'I'm fine, let's talk about how we can come to a fair deal.' 'Sure, my number one item if food if you can spare any.'
Utterance: 'It'd be nice if we can both get an even split right?'
[A]: Yes


[Q]: Context: 'I have plenty of firewood.  I need two pieces of food though for my hiking.  ' 'one piece wouldn't be enough? i will give all the water' 'Nope, I need two.  I can give you all of the firewood. '
Utterance: 'all the firewood and one food then, not ideal but i can work with that.'
[A]: Yes


[Q]: Context: 'okay that sounds like a better deal then! I will take all the firewood and 1 food, and you can take the 2 food packages' 'Awesome, I appreciate that. How does the water need look on your side?' 'I think having two waters would be good for me because my mom forget to pick extras up at the store yesterday😮'
Utterance: 'Oh no! Moms can always be so forgetful. I do notice that leaves you with 6 items and me with 3 though. I think it might be better if I take the 2 waters to make it more equal.'
[A]:
Yes