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: 'You can have most of the water and firewood if I can have most of the food. I would like to get two of the firewood so I have a nice fire to come back to after searching for a source of water.' 'How about I take all off the water, 1 firewood and 1 food package? 🙂' 'You can have all of the water if I can have all of the food. I promise that I will bring you back food. I am really good at foraging and I know all about what is edible in a forest 🙂 I want to have two packages of firewood so that I can have a roaring and hot fire going when I come back from being out all day. I am sure that I will find some fish to catch at my water source! 🙂 I'll bring some to back to share with you!'
Utterance: 'Thank you, I would appreciate that and it is very generous of you, Im not a strong hunter or fisher at all :) '
No

Context: 'Hello there. That deal most definitely will not work for me. ' 'OK, If i take all 3 of the foods and 1 of the waters you can have the remaining packages ' 'I need to eat too, especially if I want to go on a long hike. How about I take 2 foods, 2 waters, and 1 firewood? '
Utterance: 'I am sorry that will not work for me, how about i take 2 food, 1 water and 1 firewood and you can have the rest? That way we each get some of each'
Yes

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.'
No