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.

[Q]: Context: 'I'll only give you all the firewood if you give me everything else. I know it's your top priority😮' 'How about I take all the wood, give you all the food, you can have 2 waters and I can have one.  Having a little extra water will help me with all the hiking we will be doing, plus since i wont be eating much I want to stay hydrated.  Will that work for you>>🙂' 'cringe ☹️. Ill take one firewood and two of both water and food '
Utterance: 'Sorry - I just cant do that.  I want to come to an agreement but dont feel that its fair.  '
[A]: Yes


[Q]: Context: 'Yes, I expect that! You need food most and I need water, so let's propose an exact trade? 3 for 3?' 'My main objective for the camp is food and firewood, since I have a large family and the amount of food they give in the camp is very small for all my family and my wife and I have to cook with firewood in the camp.' 'I understand completely. I would like to have all three water, and I'm only traveling with just me, so how about 1 firewood? The rest for you.'
Utterance: 'No me gusta mucho el trato, pero para eso debemos hablar y decidir como adultos un buen trato para los dos. Lo que queremos es disfrutar en el campamento.'
[A]: Yes


[Q]: Context: 'That's some good news. 🙂 Are you sure she is going to be bringing food with her?' 'Yea She is bring tons of food. So don't worry we have plenty of food to spare. 🙂 She did forget to get water. I didn't know she was coming so i didn't grab any and I forgot the 3 packages of water for myself at the store. ☹️' 'Yikes, that's not good. Water is very important, especially if you now have to take care of two people at your campsite now. I do have 3 packages of water but I don't think I can spare it all.'
Utterance: 'I tell you what if we trade 3 food for 3 waters! I think that would be fair snice you said you need some food and snice I need some water. 🙂'
[A]:
Yes