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: 'That wouldn't work for me, I will be going hiking during camping, so I need all of the water I can get' 'Well then maybe we can just do a trade, the water to you and the food to me.  And if I got two of the firewood, I'd have plenty of time to just boil and purify some riverwater instead' 'That does not seem entirely fare but I need more water so I will take this deal'
Utterance: 'It's honestly not that fair to me either, but sometimes we just end up with slightly conflicting priorities in life.  🙂  I think making the best of the situation is the way forward.'
Example Output: Yes

Example Input: Context: 'Hello - I would love be able to split some supplies with you🙂. I could use some extra firewood so maybe i could take 3 and maybe you could have some extra food? ' 'Maybe I could take 2 firewood 2 food and 0 waters?'
Utterance: 'I was planning on staying up all night and keeping my fire going all night.  Honestly I could give you all the extra food if that helps you if I could please have the 3 firewood?  We could split the waters'
Example Output: No

Example Input: Context: 'But If I will give you these items I don't get enough package friend.' 'i understand friend, we going to a snow fall place so we need fire wood and sicked and kids are in my team so i need food and water' 'Okay I will give you 2 firewood 2 food and 1 water.'
Utterance: 'food and water is ok, but i must need 3 pack of fire wood friend'
Example Output:
No