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: 'you consider me giving one of your water package and collect food package, if you are lucky you can get liquid foods too🙂' 'I don't like food. my stomach is always full. I only drink water since im thirsty most of the time.' 'yeah i can understand buddy, but the fact is we can share some items. you are not getting food packages and getting packages alone which you preferred. Try some food packages too'
Utterance: 'Okay I agree what about this deal. I get 2 water, 1 firewood ,and 1 food package.'
[EX A]: No

[EX Q]: Context: 'Since I am giving you all of the firewood that you said was most important to you, I feel I should get at least the same amount of items as you, especially since you are getting exactly the firewood you want. I will need to stick to three waters and two food.' 'The firewood is most important to me to be sure. However, if you get more food and all of the water I could end up going hungry.☹️' 'Well I would be happy to exchange you one of your firewood for the one water you need. That way you won't go thirsty.'
Utterance: 'Hmm, no I think I will agree with your first arrangement. I get 3 firewood and 1 food.'
[EX A]: Yes

[EX Q]: Context: 'Hello! I would like more packages of food the most. What are you looking for?' 'I would need water the most as I forgot to bring enough. I can give you all my food for all of you water, if you'd like?' 'That would be amazing! So I could take all 3 packages of the food and you could have all 3 packages of the water. Now, we just need to split the firewood. Could I take 2 of the firewood leaving you with 1? I think I would need more for cooking the food. '
Utterance: 'Awesome! That does sound like a deal. I wish we had more firewood to split because I am afraid it might get cold.'
[EX A]:
No