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.

Context: 'No I need more firewood' 'Okay, can I ask why the firewood is important for you? 🙂' 'You can find more wood in the forest but I'm going somewhere where there's not a loot of trees ☹️'
Utterance: 'That makes sense. What if you took 2 firewood in exchange for 1 additional food?'
No

Context: 'I'm thinking I'l get 2 firewood, and 2 water and 1 food. I'm not sure what you need, but we can figure it out. ' 'my highest priority is water, i need it to stay hydrated from the camping beers' 'Who doesn't? I need more wood. I'm skinny. I get cold easily. Beer hidrates dude 🙂'
Utterance: 'ha no prob on the wood, its out there in nature so i can do with less of it hows 3 water, 1 food, 0 wood sound'
No

Context: 'water, food then firewood. It's really hot so I need to make sure we are hydrated. We forgot a bag of supplies that had mostly food so we really could use food. It's hot so firewood isn't necessary. If anything we can get it from around or on a hike.' 'of course, we should help one another, we will figure something out i'm sure' 'Yes, I think we can. I'm thinking 3 water, 2 food and 1 firewood for myself? How does that sound to you?'
Utterance: 'i can't agree to that, the best i can do is 2water 1 food and 2 firewood for you, i have to have supplies too'
Yes