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: 'Yeah, I'm going to the desert so I'm hoping to have enough water. I'm good on food and I hunt for a lot of it anyways.' 'I've never been a good hunter. I wish I had those abilities.' 'I would part with all the food if I could get all the firewood.'
Utterance: 'That seems fair. How about water. How would that be split? I'm very concerned.'
Example output: Yes
Example explanation: This is correct since the participant points out that the proposed deal seems fair.
Q: Context: 'Hello, How are you? My children love to eat and have fires daily. I hope this deal works for you.🙂' 'Hello, I'm fine. I understand your need. I have health issue I can't stand without food and water.I hope you will understand my situation.' 'I completely understand where you are coming from. How much food do you need?'
Utterance: 'I need at least 2 package of food and 3 package of water. Please do favor for me.'
A:
Yes