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: 'OK, that works for me. But I would like a lot of firewood. I like to hunt and cook what I kill.' 'Ok I will give you 2 firewood ' 'So I get 3 food and 2 firewood? And you get all of the water?'
Utterance: 'yes does that sound good to you?'

Output: No


Input: Consider Input: Context: 'okay friend. In my team old age sicked peoples and kids are there so i need some extra package.' 'Okay friend. Which item do you need the most?' 'I need 3 pack of fire wood and 2 pack of food and 2 pack of water'
Utterance: 'But If I will give you these items I don't get enough package friend.'

Output: Yes


Input: Consider Input: Context: 'That's awesome! And oh no! I have a medium amount of food so we can work that out! How are you doing on water?' 'I have a medium amount of water so I would like some more. I wish we had lots of supplies to split up evenly but I'm sure we can work it out🙂' 'I agree! We can figure out working out a deal! What if I gave you 2 food and 2 waters and you gave me your wood and one of food/water? If that doesn't work for you we can also figure something else out.'
Utterance: 'I think that sounds reasonable. Of course, I could counter with I take 2 food, 2 waters and 1 firewood. What do you think of that?'


Output: No