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: 'I was planning on building a big bonfire for the evening.  There'd be plenty of room if you wanted to join for warmth.  I'm a bit hungry and would appreciate the extra food.  You can have all of the water if you'd like.  If you warm it by the bonfire, it may be useful to soak in to improve your circulation.' 'I get tired to easy so I probably won't be much fun at a bonfire ☹️. I really do appreciate the offer though. I would think the extra food would do you more good for your party. ' 'The extra food would be appreciated.  How about if I take just two each of the firewood and food, and you can have the remainder, plus all of the water?'
Utterance: 'I am just concerned that only 1 firewood might make it so I'm too cold to function. '
[A]: No


[Q]: Context: 'Hi there!' 'Im really low in food, is it ok if I get 3 Food, 1 water & 1 firewood? What do you think?' 'With the cool weather in degrees lower than expected, my family of 7 are consuming firewood faster than expected. Thus, I would like all the firewood in exchange for the food'
Utterance: 'Oh ok, that will be great. How about the water? Is 2 for me and 1 for you ok?'
[A]: No


[Q]: Context: 'Hello there, I'm in a lot of need for some firewood! I'd not be against taking most of it if that's alright?'
Utterance: 'Hi, I need the all food package. I will frequently feel hungry'
[A]:
No