instruction:
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.
question:
Context: 'Great, we can split the food, how are you on water?' 'That would be great. I need to have frequent small meals throughout the day so the extra food would help. I have plenty of water. ' 'alright, so I'll keep the water, and firewood, and give you 2 extra food.  Does that sound like a good deal?'
Utterance: 'I actually need one firewood and one food package. I can give you one water. '
answer:
No


question:
Context: 'HI, I will have all of the packages of food and 2 waters and 2 firewood and you can have the rest. Unless none is needed for you then I will take them all.' 'i will need 3 firewood packets.  I have a terrible disease that prevents my circulation from working properly.' 'That does sound bad. I am going camping and my kids might want to stay up late so I will need extra firewood for this to keep light and more warmth. I will take all 3 extra of the food and the water but I need 2 firewood also.'
Utterance: 'no that won't work.  I will give you 3 food and 1 water.  I will take 3 wood and 2 waters.'
answer:
Yes


question:
Context: 'That's a good reason! I don't run, but could use some water. ' 'How much were you thinking? I could also use some food, but really don't have much need for firewood.' 'How about we split? 2 water for you, and 1 for us, that way we can go on a fun hike. In exchange, could we also have all the firewood? We want to have a community fire and you're more than welcome!'
Utterance: 'So 2 waters for me, 1 for you, and all the fire wood. How about the food? Perhaps 1 for me and 2 for you? Sound reasonable?'
answer:

Yes