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: 'Hello I would like to have more water then what I got because I drink a lot' 'Hi, nice getting to interact with you. It is fine if I give one of it, as that is something that I need the most as well.' 'I can give you 2 packages of food or firewood instead'
Utterance: 'Hmm. I'm not able to compromise on this, I'm fine with 1 package of firewood and food each.'
[A]: Yes


[Q]: Context: 'What if I get 2 food packages and 1 water package....and you would get 1 food package and 2 waters?' 'I think we will need more extra food than that.  How about the reverse, I get 2 food and 1 water and you get 1 food and 2 water.' 'I could do that if I could then get 2 packages of wood as well because it's been bitterly cold this time of year at night in the Alleghenies.'
Utterance: 'That sounds fair.  So I would get 2 food, 1 water, and 1 firewood.'
[A]: Yes


[Q]: Context: ' I appreciate your willingness to discuss this, so we both get a fair deal. I would really like if I get 3 food, 1 water, and 1 firewood. Then you would get 2 water and 2 firewood. You said that you really need water and food, so I think that would work best for both of us to get what we need most. What do you think? 🙂' 'Np, problem, water is high in demand on my end with the amount of kiddos I am taking. Water is my main concern, will you be okay with 3 Foods, 2 Firewoods and no water?' 'I would really like 3 food, 1 water, and 1 firewood if possible. Would you agree to that instead?'
Utterance: 'If you were me would you be happy with 0 Foods, 2 waters, and 2 Firewoods? when water is your priority? maybe we can make it even, your highest priority is Food and mine is water? you can have all firewood? I will be shorten out on everything except the water and youll get 3 foods and 3 firewoods, while i only get 3 waters?'
[A]:
Yes