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.

[EX Q]: Context: 'Would they be okay with 2 food? Otherwise can give you an extra and I can take either an additional water or firewood 🙂' 'I have a great offer. How about I take 2 food, 2 firewood and 1 water and you will get the extra water your camp needs!!' 'We place a premium on the water. That's the same amount of water, do you mean we take 3?'
Utterance: 'I do need some extra water. So I will need to take 1, but our preference is food and we would need firewood to cook it on. if you're OK with this, I will submit it. Its a great deal I think and we'll both get what we need'
[EX A]: Yes

[EX Q]: Context: 'That sounds like fun. I checked my list and it looks like I am short on firewood however, would you happen to be able to spare some?' 'Yeah I could supply you extra firewood. I would like some extra food if you could spare that.' 'Yeah I could. How about I get 2 firewood, 1 food, and 2 water. And you can have the rest?'
Utterance: 'Yeah that sounds resonable. I hope you can have fun on your trip.🙂'
[EX A]: Yes

[EX Q]: Context: 'I also need water. You would not believe how much my family and I sweat!' 'I understand. I am unfortunately sick and need the warmth of the fire and water to take my medication or I will die very soon' 'You can have all of the firewood, we just need 1 water '
Utterance: 'That is fair. Could I also have 1 food so I do not starve'
[EX A]:
Yes