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: 'Alright. I have a  feeling we will have a deal then. How about you give me two water for a firewood?' 'that sounds like a plan' 'how many firewood you need? Maybe we could also exchange one food for one more firewood?'
Utterance: 'I would appreciate that, I was thinking of asking that! I would not require much in the way of extra food or water but the fire wood would be important!'
[EX A]: No

[EX Q]: Context: 'I'll need water. My kids take medications and need to stay hydrated.' 'Absolutely. My second most needed item is food so that works out well.' 'Well I am happy to give you all my food in exchange for all your water.'
Utterance: 'We can do that! How do you want to split up the firewood?'
[EX A]: No

[EX Q]: Context: 'Sounds good, I need food the most, what is your most needed item?' 'my item is food too.' 'Ok, other than food I could use some firewood. Maybe you could take 2 food and I could take 2 firewood?'
Utterance: 'sure, but i will get what then?'
[EX A]:
No