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: 'I’m doing fine. How about you?' 'I'm doing well. I was hoping I could have the extra firewood because my group decided to camp for a few extra days and want to make sure we have enough' 'How many of you are on the camping grounds?'
Utterance: 'It's just my family. There are 6 of us total'
No

Context: 'Hello, I'm excited for our camping trip!' 'Hey buddy, yes I'm so pumped for it.' 'Okay so I'm planning this super cool backpacking expedition up the waterfall but I'm going to need all the additional water and food for everyone.'
Utterance: 'All of the additional water and food? That doesn't seem very fair. ☹️'
Yes

Context: 'I see, well it sounds like you're going to need some additional food with those children. How about I provide you with some additional food and you can help me with my need for heat with firewood?' 'okay how i take all 3 food and 1 firewood?' 'The firewood sounds like a solid deal; I would need a little food though to assist me. The good news is since there's a stream near me, I won't need any additional water, so I am happy to provide you with all of the additional water.'
Utterance: 'i am not able to do that unfortunately i desperately need firewood. '

Yes