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: 'Hmmm, I think I really need the firewood.  I brought softwoods and they burn out quickly so I don't think I'll have enough wood to keep me going through the night. I get kinda scared without the fire.  What is your priority?' 'Okay, well firewood is also my top priority since it will be so cold tonight.  But I would be willing to take only 1 firewood (and give you 2) as long as I got 2 foods and 2 waters ' 'Thank you for the offer on firewood.  I think that sounds fair.  However, I really would like at least 2 waters as well. '
Utterance: 'Hmm unfortunately I can't budge since I would be accepting less of my top priority item.  It sounds fair to me though; I'd get 5 items in total but less of my top priority and you would get 4 items in total but more of your top priority'

Answer: Yes


Question: Context: 'so I'll get 2 water, 3 food and 0 firewood?' 'Incorrect. ' 'In order to make it work I need at least 3 water and 2 food. Or I could do 3 firewood and 2 food and 0 water. I don't see any other way around it'
Utterance: 'It has to be fair. Right now I don't think you are being fair. The last offer I gave was great for you. You all all of the food and 2 water.You wanted 3 food in your last offer so thats a great offer I suggested.'

Answer: Yes


Question: Context: 'So I get 2 waters and 3 foods. and you get the rest?' 'I could use one food too. How am i going to survive without eating anything?' 'Okay So I get 2 waters and 2 foods and you get the rest?'
Utterance: 'Don't you think it is a fair deal?'

Answer:
Yes