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: 'Hi! How is your camping trip going?' 'It's going good we could use some more supplies such as food and firewood, though.'
Utterance: 'Same here haha. Is water your lowest priority item too?'
[EX A]: No

[EX Q]: Context: 'I would need 2 food if you keep all the firewood. It would make it easier on me cooking wise since I'll have to look for wood' 'OK, that is fair.  So I would get 3 firewood, 1 water and 1 food and you would get 0 firewood, 2 food and 2 water.' 'I think that sounds fair to me'
Utterance: 'Sounds fair to me too. do we agree to submit the deal?'
[EX A]: Yes

[EX Q]: Context: 'Hello, i also need firewood, i have a medical condition where it is very hard to maintain my body temperature. ' 'My wife is in the same boat. That sucks. I wonder if it will be cold.' 'Well i do not need the water at all as i have a distiller'
Utterance: 'And I have plenty of food as I'm the only over eater of the group.'
[EX A]:
No