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.

Context: 'Hey, I am excited to go camping too! Would you mind sharing your top priority items with me so that we can come up with a fair deal? Ideally I would love 3 firewoods, 3 foods, and 2 waters just like you aha. But perhaps we can each get at least 3 packages of our highest priority item ' 'Hmmm, I think I really need the firewood. I brought softwoods and they burn out quickly so I don't think I'll have enough wood to keep me going through the night. I get kinda scared without the fire. What is your priority?' 'Okay, well firewood is also my top priority since it will be so cold tonight. But I would be willing to take only 1 firewood (and give you 2) as long as I got 2 foods and 2 waters '
Utterance: 'Thank you for the offer on firewood. I think that sounds fair. However, I really would like at least 2 waters as well. '
Yes

Context: 'LOL - not a chance. You're going to have to give me more than that. I am more skilled and thus need firewood. How about this...I will take 3 firewood and 2 food. You can take all the water because you're so non-skilled in the wilderness. I am going to hunt for my food, but again I have a large family. I am not considering your request at all. We will need to come to a decision relatively soon.' 'I understand your preferences. If I take all of the water, 1 firewood, and 2 food your family will still have the opportunity to have a good camping trip and I can learn to survive on this trip. Please consider my request again.☹️' 'Ok - you're not being reasonable at all. If you're so incompetent at going camping, maybe you should stay home and I can take all the supplies. How's that for an excellent offer? All for me and 0 for you.'
Utterance: 'I think it would be good to come to a compromise. If I take all of the water and have the 2 foods, you can take all of the firewood as you originally proposed. Yet, I will have a tough time learning how to survive on a camping trip.😡'
No

Context: 'That makes sense. What if you took 2 firewood in exchange for 1 additional food?' 'you can have 3 food' 'Alright🙂 From what I understand, that means that you would take 3 firewood, and I would take 3 water and 3 food. Is this your understanding as well?'
Utterance: 'Can we split the water? You can have 2'
Yes