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.

[Q]: Context: 'Incorrect. ' 'In order to make it work I need at least 3 water and 2 food. Or I could do 3 firewood and 2 food and 0 water. I don't see any other way around it' 'It has to be fair. Right now I don't think you are being fair. The last offer I gave was great for you. You all all of the food and 2 water.You wanted 3 food in your last offer so thats a great offer I suggested.'
Utterance: 'I will agree to 2 water and 3 food for me and the rest for you.'
[A]: No


[Q]: Context: 'i could give you 2 water bottles and 3 food if you can do 3 firewood' 'OK. Are you need Extra food packages?' 'no, I am okay with food which is why I offered them all to you since all my firewood is ruined. I figured if i gave you 2 water and 3 food you might be able to spare the 3 firewood'
Utterance: 'No I cant give you all the firewood. I will take atleast one firewood. Also can I have all three water bottles. '
[A]: Yes


[Q]: Context: 'Then what do you think is fair?' 'I think that I should get 2 firewood, 1 food and 2 water' 'I will let you have 2 firewood if you let me have 3 food, 2 water, and 1 firewood.'
Utterance: 'That would leave me with no food. I counter with 2 firewood 1 food 1 water. '
[A]:
Yes