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: 'that won't be fair, how about I get 1 water, 3 food and 1 firewood, that way u get the most water' 'Interesting.  If I decided to forgo water completely, would you accept giving me everything else?' 'no, at the most i can do is i get 2 water, 2 food and 0 firewood or I get 1 water, 3 food and 1 firewood'
Utterance: 'But you get everything you wanted. You said you needed 3 water, I offered it to you.'

Answer: Yes


Question: Context: 'Hello, I'd like to get all of the water, an extra firewood and 2 of the food' 'Hi there.  That hardly leaves me with anything and doesn't really work for me.  I was hoping to make a campsite feast and get the extra food.  If we can do that, I'd be happy to give you all the water and that extra firewood.' 'I am a big guy, so I will need some more food, how about you give me an extra food while you hold on to two'
Utterance: 'I can't give you all the water if you take one of the food, I'm very sorry.  I could take 2 of the food and 2 of the water if we do it that way.  I really need cooking supplies if I want this trip to be productive for me - it's why I was coming.'

Answer: Yes


Question: Context: 
Utterance: 'Hello. I'm looking forward to striking a deal with you that makes both of us happy!'

Answer:
Yes


