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: 'Well fortunately if you are camping that won't be too bad. You'll blend in with the wilderness.' 'My friends will run away. I will not be comfortable either. So how do we split what we have?' 'If they're true friends, they won't. I'll take 2 firewood, 2 water, 3 food.'
Utterance: 'That is very unfair ☹️'
Yes

Context: '😮 Been there and done that.  It's great when you can start to see the change in their self esteem!' 'yes, for sure starting to see results, id be more than happy if i could get two or three waters and at least one or two firewood ' 'I can definitely oblige on the water as we are lucky enough to have a spot that is just by the lake.  Makes for a cold night, but all the fresh water and fish you can handle!'
Utterance: 'yea, i love some blue gill! '
No

Context: 'I can take 2 firewoods, you can take all the food and most of the water. So, I am offering you all the food and water.🙂' 'I suggest you look at my offer because you can get hungry and also need water.i really need the firewood as well' 'We already have more food than we need due to the extra people who brought more food than we'll eat. Plus, we're near a fresh water supply. And there's so much snow, it's insane🙂I need all the firewood. '
Utterance: 'all the firewood will not work for me.okay you can have 2 firewood while i get 1 firewood,3 waterand 3 food'

Yes