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: 'yes ofcourse i agree with you.my dear friend will you have 1 food 3 firewood and 3 water' 'I would prefer 2 food and less firewood. There is tons of firewood where I am but there is no lake so I can't fish. No berries around here either. It's pretty scarce' 'okay is 2 food 1 firewood okay for you while i get 1 food 2 firewood and 3 water'
Utterance: 'I'm going to need some water as well. How about 2 food, 2 water and 0 firewood for me?'

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


Input: Consider Input: Context: 'hello, I am good, I am very excited about this trip. how are you?' 'i am great, super excited about camping as well, are there any supplies that you really need?' 'i really need water and food. we did not get enough of those.'
Utterance: 'Those are my priorities as well, how about you get all the food and two firewoods, and i get all the water and one firewood, does that sound fair?'


Output: Yes