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: 'I would give you 2 water in exchange for 2 of your food supplies' 'im sorry i mistyped. okay yes thats a deal. so last we have to talk about the wood. what do you think' 'Oh yes, sorry I am so caught up with my wound I completely forgot about that. I can spare 1 firewood so you would get 2, do you think you could spare another water in exchange for the wood?'
Utterance: 'i cant unfortunately i really need the two water im sorry. '

Answer: Yes


Question: Context: 'doesn't really seem fair for you to get all the firewood. I would like to have at least one because then we're completely in the dark.' 'You get lots of water and food for your children, I am cutting back on my goals by giving up energy which means I have spend more time outside hiking.  I do need to stay warm' 'yes which is why you have two firewood. I think it is fair for me to get at least one. If food is so important to you then I'll give you two food. but we would be in the dark'
Utterance: 'I suppose that's fair enough.'

Answer: Yes


Question: Context: 'It will be. And I'm grateful that you recognize the need! Will you do me a solid by permitting me to have these provisions?' 'I can give you 3 firewood, but only 1 food and no water.' 'Good gravy! I will need to cancel the expedition if that's all you have to spare. Can you surely do no better?'
Utterance: 'I do like to have lots of water because I get thirsty on some of my longer hikes. How about I give you 3 firewood, 1 food and 1 water?'

Answer:
No