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: 'Yep.  I am excited.  I could really use the decompression and time away from society. ' 'I agree, can't wait to unplug. As far as supplies go, I think its going to be hot and sunny where I'm going, wouldn't mind a bunch of extra water.' 'Water is extremely important to me too.  I can give you 2 waters if you give me all 3 firewoods. '
Utterance: 'Hmm, ok, thats pretty fair. I do have a larger group going as well, so would it be okay if I got 2 extra food then?'
[EX A]: Yes

[EX Q]: Context: 'okay friend. In my team old age sicked peoples and kids are there so i need some extra package.' 'Okay friend. Which item do you need the most?' 'I need 3 pack of fire wood and 2 pack of food and 2 pack of water'
Utterance: 'But If I will give you these items I don't get enough package friend.'
[EX A]: Yes

[EX Q]: Context: 'yes, that would work for sure' 'Thats Good, I'm a big guy and like to eat when I'm out and about. ' 'what if we do 3 water for me, 3 food for you, and split the firewood?'
Utterance: 'No, that won't work. I told you in the begining I needed some water because of the medication I'm on.'
[EX A]:
Yes