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.

Input: Consider Input: Context: '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' '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.'
Utterance: 'That wouldn't work for me, I will be going hiking during camping, so I need all of the water I can get'

Output: Yes


Input: Consider Input: Context: 'I like your plan.  It is simple. I will agree to that.' 'So all that is left is water, i guess i should atleast drink alot of it if i wont eat much haha 🙂' 'For sure, and you will need some way to put out the fire. 😮'
Utterance: 'Haha good point, you worked with me on the firewood so i am ok with you getting two waters and i will get one, deal?'

Output: No


Input: Consider Input: Context: 'Yeah I need firewood too. It's only 50 degrees at night on the mountain, even in the summer.' 'How would you feel about giving me some firewood for food?' 'Maybe, I need food too but I want firewood the most.'
Utterance: 'Do you have a deal to offer?'


Output: No