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: 'can't do that, I would need 2 water, 2 food don't need firewood.' 'No one wants firewood!  Guess no s’mores!' 'It's bad for the environment'
Utterance: 'How about I take 1 water, 2 food and 3 firewood'
[EX A]: No

[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: 'yeah, i understand that. we are all apart of a weigh watchers group ao we' '😮 Been there and done that.  It's great when you can start to see the change in their self esteem!' 'yes, for sure starting to see results, id be more than happy if i could get two or three waters and at least one or two firewood '
Utterance: 'I can definitely oblige on the water as we are lucky enough to have a spot that is just by the lake.  Makes for a cold night, but all the fresh water and fish you can handle!'
[EX A]:
No