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.

Let me give you an example: 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.'
The answer to this example can be: Yes
Here is why: This is correct since the participant points out that the proposed deal seems fair.

OK. solve this:
Context: 'If I will give 2 firewood for you and I will take all the food package with 2 water.' 'I need all 3 firewood! But I'm willing to discuss food with you. I have a lot of that.' 'Wow. Thank you. Ok. Then I will give you all 3 firewood, however I need all food package with water.'
Utterance: 'How about I get 3 firewood, and you get 2 food AND water? We both win with that, I think.'
Answer:
Yes