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.
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Question: 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! '

Answer: No


Question: Context: 'I have a medical condition that causes my veins to close up when I get too cold. I will thus need the 3 firewood.' '☹️Oh, that sounds awful. Are you sure you need all three packages of firewood?' 'I might be able to get by with just two... I'm on a diet though, so I don't need as much food.'
Utterance: 'That's a relief. I actually have a friend joining me and they don't have their own food supply. I don't have enough for two people.'

Answer: No


Question: Context: 'If I will give 2 firewood for you and I will take all the food package with 2 water.' 'I need all 3 firewood! But I'm willing to discuss food with you. I have a lot of that.' 'Wow. Thank you. Ok. Then I will give you all 3 firewood, however I need all food package with water.'
Utterance: 'How about I get 3 firewood, and you get 2 food AND water? We both win with that, I think.'

Answer:
Yes