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: 'but i can't give you 3 food and 3 firewood, thats 6 items vs the 3 water' 'Sure you can.  If you really want water the most, why would you care about the rest as much?😮' 'most does not mean i have to neglect the rest, anyways either a) I get 3 water, 2 food and 0 firewood or b) I get 1 water, 2 food and 2 firewood'
Utterance: 'That is simply unacceptable.'

A: Yes
****
Q: Context: 'Hi there. How's it going?' 'I am doing good, how are you doing?'
Utterance: 'Doing well. My kids are looking forward to this camping trip. They've never done it before so they're looking forward to the experience!'

A: No
****
Q: Context: 'No I was thinking I would get all the waters and you get 1 firewood or I get one food 2 waters and 2 firewood. ' 'We packed enough water but the kids spilled some so I just wanted to make sure we have additional water in case we run out. But we can do with only 1 water. We do really need the food though ☹️' 'So do I. I'm trying to bulk up because I've been skinny all my life. ☹️ Let me just get one please☹️☹️☹️☹️☹️☹️'
Utterance: 'well we do not want to be unreasonable. How about we take 2 food, 2 water then just in case they can be satisfied with the extra water. In that case you get 1 food, 1 water and all firewood. '

A:
Yes
****