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: 'Hey there, unfortunately, I'm in a bit of a quandary with firewood too, as I am going to a place where it's fairly cold and will need more for heat. ' 'thats terrible! i broke my leg and wont be able to collect my own firewood , could i maybe get 2 packages? ☹️' 'Terribly sorry to hear that; it sounds like you won't be able to camp much in that condition. I assume you have someone coming along to help you because of your leg?'
Utterance: 'just a bunch of children under 5 who wont be able to gather firewood. so i desperately need at least 2'
[A]: No

[Q]: Context: 'That deal is not favorable for me' 'Feel free to counter, but I'm not loving anything that I've gotten so far.' '1 firewood, 2 water, 1 food for me which should mean we each get 2 priority packs -'
Utterance: 'Feel free to counter, but I haven't liked anything so far.'
[A]: No

[Q]: Context: 'I can understand that. I know I really need the food the most. I'm already worried I'm going to run out. I also have blood sugar problems, so I cannot run out ☹️' 'Thats fine. If you want you can have 2 foods and I get 2 of the fire wood. Sounds fair?' 'And I would take 3 water? '
Utterance: 'That would be a problem since I need the water too. I was hoping that since you got 2 foods ill get the 2 waters'
[A]:
Yes