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.

Example Input: Context: 'but i can't give you 3 food and 3 firewood, thats 6 items vs the 3 water' 'Sure you can.  If you really want water the most, why would you care about the rest as much?😮' 'most does not mean i have to neglect the rest, anyways either a) I get 3 water, 2 food and 0 firewood or b) I get 1 water, 2 food and 2 firewood'
Utterance: 'That is simply unacceptable.'
Example Output: Yes

Example Input: Context: 'Hello, are you excited for your camping trip?' 'hii'
Utterance: 'Do you have an idea of how you'd like to split up the extra supplies?'
Example Output: Yes

Example Input: Context: 
Utterance: 'I will submit a deal that might benefit us both.  '
Example Output:
Yes