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: 
Utterance: 'I want to make sure I'm well prepared for camping. How would you feel if I took 2 water, 1 firewood, and 2 food?'
[A]: No


[Q]: Context: 'Firewood, due to the area that we are going to. How about you? ' 'Oh I see. You can have all 3 firewood if you are ok with me taking all 3 food.' 'Hmm, well I'd love to get some of the food. What I took 2 firewood, 1 food and 1 water? '
Utterance: 'Sorry but I really need all 3 food. All the food I brought with me has spoiled because the AC in my car broke. ☹️'
[A]: Yes


[Q]: Context: 'no we agree that you would get 3 food, i would get 3 waters' 'It's agreed, I will get 3 extra packs of food, you will get 3 waters but the extra wood for my kids is needed how about I get 2 extra firewood?' 'i made a mistake i would like 3 wood and 1 water.  you can have the food and 2 waters'
Utterance: 'That is fine. I will get 3 food, 2 waters and 1 extra wood. Agreed?'
[A]:
No