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: 'This offer is good for me but I need some water too. Can we share the water and have all the firewood? 🙂' 'No, I offer you 3 food, and 1 water.  I would like 2 water and 3 firewood.' 'Well this is perfect for me. I agree with 3 food and 1 water. Do you also agree?🙂'
Utterance: 'Sure that sounds fair to me, we both get what we need.🙂'

Output: Yes


Input: Consider Input: Context: 'Farther. I'm going so far north that we'll be passing over the north pole and keep going into Siberia.' 'That sound cool, I mean cold. 🙂' 'It will be. And I'm grateful that you recognize the need! Will you do me a solid by permitting me to have these provisions?'
Utterance: 'I can give you 3 firewood, but only 1 food and no water.'

Output: No


Input: Consider Input: Context: 'can i have 2 foods too' 'If I can have all the firewood...' 'i am giving you one firewood'
Utterance: 'That doesn't work for me. I propose you get 2 water and one firewood and 2 food.'


Output: Yes


