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: 'Oh, that won't really work for me.  I was hoping to get extra food and water for this trip since I need water to take medication and would love the food to plan a special meal.  I'd like say, 2 food, 3 water and 1 firewood' 'I could give you 2 food, if I could have 3 firewood and 2 water' 'Hmm, how about I take 2 food and 2 water and you can have all the firewood?'
Utterance: 'This is fair, but I do not have any use for much firewood. I could give you 2 firewood, 2 water and 1 food'
[EX A]: Yes

[EX Q]: Context: 'i mean i will be needing 3 water 2 firewood and 1 food' 'I can't give you that since it wouldn't be fair to me, I'll give you a better offer. I get 3 food 1 water 0 firewood and you get 0 Food 2 water and 3 firewood and 2 fire' 'no am not accepting that 2 water 2 firewood and 1 food'
Utterance: 'I need you to understand that if we don't have an agreement it doesn't work. What you ask for is not fair. Since you are having more than me, you have calculated correctly and you will realize that what I offer you is the most fair for both🙂'
[EX A]: Yes

[EX Q]: Context: 'Hi there!' 'Im really low in food, is it ok if I get 3 Food, 1 water & 1 firewood? What do you think?' 'With the cool weather in degrees lower than expected, my family of 7 are consuming firewood faster than expected. Thus, I would like all the firewood in exchange for the food'
Utterance: 'Oh ok, that will be great. How about the water? Is 2 for me and 1 for you ok?'
[EX A]:
No