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: 'Yep. I am excited. I could really use the decompression and time away from society. ' 'I agree, can't wait to unplug. As far as supplies go, I think its going to be hot and sunny where I'm going, wouldn't mind a bunch of extra water.' 'Water is extremely important to me too. I can give you 2 waters if you give me all 3 firewoods. '
Utterance: 'Hmm, ok, thats pretty fair. I do have a larger group going as well, so would it be okay if I got 2 extra food then?'

Answer: Yes

Question: Context: 'I love s'mores. Food is my number one concern though. If I'm only getting 1 of the food I really need all of the water. How does that sound?' 'So I get only 3 packages? 2 food and 1 firewood? ' 'Do you need more firewood? I could compromise there.'
Utterance: 'How about I get 2 food and 2 firewood? You can get all the water plus 1 food and 1 firewood? '

Answer:
No