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.

Q: Context: 'I am allergic to tea and coffee. I wonder if the smaller fire would be more quaint for everyone to sit around. ' 'It really wouldn't do the job that well at all.  You could always prepare hot cocoa or use your share of the food to make a warm stew.  I really do need at least the two firewood and a couple of food.  You can have all the water to make a hearty and hot stew to get your through the night, though.' 'I can't eat much anyway because of the health issues. You could have all of the food if I could get the extra firewood. That would still give you an extra firewood in addition to the basic supply and lots of extra food for your party. I'm sure they would love having some of the stew you mentioned.'
Utterance: 'Well, how about I take just the one extra firewood, plus all of the food, and one of the water so that I can make stew?  Would that work for you?'

A: Yes
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Q: Context: 'i could give you 2 water bottles and 3 food if you can do 3 firewood' 'OK. Are you need Extra food packages?' 'no, I am okay with food which is why I offered them all to you since all my firewood is ruined. I figured if i gave you 2 water and 3 food you might be able to spare the 3 firewood'
Utterance: 'No I cant give you all the firewood. I will take atleast one firewood. Also can I have all three water bottles. '

A: Yes
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Q: Context: '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' 'Well, how about if I take 2 firewoods and all of the food and you can have all of the waters? I have a device that I can make clean water, but will need more calories to do so! 🙂' 'Can't do!  Water is my lowest priority since I already brought iodine drops to purify water myself aha.  I still think it's fair if I get 1 firewood 2 food and 2 water (or if it helps you to feel better, I can take 2 firewood and 1 food and 1 water)'
Utterance: 'Ok...Then how about if I just take 2 firewood, 1 water, and just 1 food?  I think that is what you proposed before.'

A:
No
****