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.

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.'
Yes

Context: 'I'm sorry to hear that! But can you spare 1 for me since you probably don't need all the water.' 'Sure that sounds fair. Thank you. Besides water what do you need for your trip?' 'great. Then can you give 2 food instead? We eat a lot and need more to go through the night...'
Utterance: 'Ok I understand. Since you're willing to give me 2 water I can give you 2 food. Would it be ok then if I ask for 2 firewood? The kids were talking about making s-mores'
No

Context: 'Yes! I am so on the same page as you. I want to be sure I'm set and prepared. 🙂' 'Would you consider letting me have 2 of the 3 extra firewood?  I have health issues and I get really cold sometimes.☹️' 'Yes, I think that would be very fair, since I don't have health issues myself. Would you allow me to have 2 of the 3 food items? I need energy for hiking. 🙂'
Utterance: 'That would be perfect.  I am a gourmet cook and if you would like me to help you prepare the evening meal, I would be very happy too.🙂'

No