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: 'So I get 2 waters and 3 foods. and you get the rest?' 'I could use one food too. How am i going to survive without eating anything?' 'Okay So I get 2 waters and 2 foods and you get the rest?'
Utterance: 'Don't you think it is a fair deal?'

A: Yes
****
Q: Context: 'Let me ask you, do you need food most? If yes, what do you need second most?' 'I would love as much food as is available. I would also appreciate excess firewood, as I get cold.' 'Okay, it seems we both have the same priorities in food most and firewood second most. How about this, you take 2 packages of food, I will take 1. You give me 2 packages of firewood I will give you 1. We will then divide the water. Is that fair?'
Utterance: 'That sounds really fair! 🙂'

A: Yes
****
Q: Context: 'How much food do you need?' 'If you give me 1 unit each of water and firewood, I'll give you 2 units of food for helping me out' 'I may need two food, I don't know how much fish I can catch.'
Utterance: 'I can give you 2 of everything, but I want and need at least one of everything so my dog and I can be ok during the winter trip'

A:
Yes
****