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! It is the perfect way to get away and still manage to social distance! I am worried about having enough water though, are you short on any supplies?' 'I think I'm good. I'm not 100% sure. My husband likes to do adventures on the fly. He got these water filter straw thingies from Amazon and said that if we run out of the water I packed, that we can drink the water in the lake but I don't really trust the straws.' 'Sounds like you need water too. How about you take 2 water, 1 food, and 1 firewood?'
Utterance: 'I don't know, you said you're worried about having enough water too. I'm excited to make campfires though! My kid hasn't had a campfire smore yet so I'm super excited to see his face of joy when he experiences it.'
[EX A]: No

[EX Q]: Context: 'It should be a good weekedn for it.  Unfortuately the air;ine loss our luggage with the sleeping bags and food.  Not a good start for us with my mother-in-law along for the first time.  My wife and her is down getting trail maps while I sort out keeping warm tonight and feed after some hiking.' 'Oh no! That sounds like a problem. I have four kids so I can relate about the concerns for staying warm and having enough food.' 'I see they have some supplies here to share between the camp sites.  Maybe we can divide up the supplies so it works for both of us.  I can really use 2 wood and 2 food.  What about yourself?🙂'
Utterance: 'I think food is pretty important for you, so I'm ok with you having 2 food and I'll take 1 food. Since you get more food I think it's only fair I get 2 firewood while you take 1. You can collect more firewood along the way. I didn't have room to pack firewood either with our smaller car.'
[EX A]: Yes

[EX Q]: Context: 'I am excited too and looking forward to making a deal that works well for both of us!' 'My main objective for the camp is water, since I have a large family and the amount of water they give in the camp is very small for all my family.' 'I need water also but firewood is my second highest priority item. Maybe you could take more of the water and I could take more of the firewood.'
Utterance: 'I find it a good deal, however before making a deal, I like to talk to people, get to know them better. I plan to go to camp with my family: my wife, my four children and myself. Are you going with your family?'
[EX A]:
No