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: 'brother  k ,  bro  2 water and 2 wire wood 1 firewood can you given?' 'I think that that is acceptable to me. I want to make sure we both understand: I get 1 Water, 2 Firewood, 2 Food Packages. You get 2 Waters, 1 Firewood, 1 Food Package. I will have to ration my water, but I think the extra comfort is worth it. Does this work for you? ' 'bro its not profitable ratiobro gave 3 water 1 firewood, remaning you can take'
Utterance: 'Won't you feel hungry? I'll accept that deal if we can exchange one water for one food package. That still leaves you with two waters. I think that's the least I'm willing to accept.'

A: Yes
****
Q: Context: 'Hello, fellow camper.  Are you ready for our camping trip?' 'I am ready to go camping. I understand there might be some disagreement around the additional supplies we each can choose from?' 'There could be.  However, I think that if we are both reasonable, we should be able to come to an agreement.'
Utterance: 'I think so too. I have a medical condition - type 1 diabetes - that makes it important to bring extra water and food. I'd like to request more of those two items.'

A: No
****
Q: Context: 'Hi! I'm very excited for the upcoming camping trip!! 🙂' 'Me too! 🙂 What do you think about the extra supplies?' 'I recently bought two new puppies, and they are coming on the trip. I could really use the extra water for them!'
Utterance: 'Awww. That sounds reasonable to me. I'm hoping to have a birthday dinner for my dad on the trip, so I'd appreciate some more food and a little more firewood.'

A:
Yes
****