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.

[EX Q]: Context: 'I am a water junkie day to day but the place I am camping as a stream and I'm taking my water filter system, so I could offer you extra water in this case.' 'That is very considerate of you. 🙂' 'I see the proposed deal. Unfortunately, if you are going to take all the firewood. I will need more food and water.'
Utterance: 'that is totally understandable. Let me see what I can do 🙂'
[EX A]: No

[EX Q]: Context: 'Agreed! I am running low on firewood, unfortunately, which I need to cook food and stay warm. ' 'Oh no! That's unfortunate! Luckily, I think I have plenty of Firewood for myself so I think it would be okay for you to have more of that if needed. I don't know if I have enough food. I love to snack all day!' 'That's awesome! And oh no! I have a medium amount of food so we can work that out! How are you doing on water?'
Utterance: 'I have a medium amount of water so I would like some more. I wish we had lots of supplies to split up evenly but I'm sure we can work it out🙂'
[EX A]: Yes

[EX Q]: Context: 'I am very excited, I'm actually going camping in a week. I drink a lot of water so it's important that I bring a lot. What about you?' 'I really am! I have been watching the weather and updates about the area I will be traveling to.  They are experiencing a severe drought, so I will be in need of some extra water as well! I planned on staying an extra couple days as well.  There is a stream nearby I believe, but I'm not sure how much it has dried up.' 'That's good to hear, you always have to be careful with wild water though, it has all kind of germs. Sounds like you'll have plenty of dry firewood though. '
Utterance: 'Yes, I would be willing to let you have all the firewood for 2 of the cases of water.  How much food were you needing?'
[EX A]:
No