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 strongly agree and shall we call it a deal now? 🙂' 'Like I said, we are close but I really would feel better with just one of the firewood. I'm afraid of not being able to build a fire. If you really need the firewood, however, then I would take one additional item of EITHER the water or food instead.' 'And like I said, I strongly agree and you can have ONE firewood now. Deal close ?'
Utterance: 'Yes. I think this is a fair deal.'

A: Yes
****
Q: Context: 'Hi there! Are you excited about camping?'
Utterance: 'Hey! I sure am! The only thing is, I just learned that the canyon where I'm camping is going to be experiencing an unexpected heat wave over the next few days and I'm worried I might not be fully prepared. ☹️ What about you?'

A: No
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Q: Context: 'We have a shortage of trees in this area. Could we split those up evenly? I think that would be fair. Something like 2 of each with you getting the most of the water.' 'I really need some firewood. ' 'Yeah, that's priority #1 for us as well. If I give you one, could you give us most of the food and water then?'
Utterance: 'I definitely need one firewood. I can use either one more water or one more food. I will leave up to you. '

A:
Yes
****