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: 'I feel that I am not getting a fair deal. ' 'Then what do you think is fair?' 'I think that I should get 2 firewood, 1 food and 2 water'
Utterance: 'I will let you have 2 firewood if you let me have 3 food, 2 water, and 1 firewood.'
[EX A]: No

[EX Q]: Context: 'It should be a good weekedn for it.  Unfortuately the air;ine loss our luggage with the sleeping bags and food.  Not a good start for us with my mother-in-law along for the first time.  My wife and her is down getting trail maps while I sort out keeping warm tonight and feed after some hiking.' 'Oh no! That sounds like a problem. I have four kids so I can relate about the concerns for staying warm and having enough food.' 'I see they have some supplies here to share between the camp sites.  Maybe we can divide up the supplies so it works for both of us.  I can really use 2 wood and 2 food.  What about yourself?🙂'
Utterance: 'I think food is pretty important for you, so I'm ok with you having 2 food and I'll take 1 food. Since you get more food I think it's only fair I get 2 firewood while you take 1. You can collect more firewood along the way. I didn't have room to pack firewood either with our smaller car.'
[EX A]: Yes

[EX Q]: Context: 'We mite can do that. What do you need more of?' 'do you want extra firewood if I take extra water?' 'At the least, Do you think I could get a little extra food if I give you some extra water as well?'
Utterance: 'yes, that would work for sure'
[EX A]:
No