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: 'Hi, I'm hoping we can come to a nice deal. 🙂 I'm most interested in firewood, because it always helps to have extra if your fire goes out.' 'That makes sense. I'm also interested in firewood, but have a great need for water due to the current weather. '
Utterance: 'That makes sense. How about we start out with I get 3 firewood, and you get 3 waters?'
[EX A]: No

[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: 'I'm doing pretty good. I plan on camping with the family this weekend, how about you?' 'Nice. Same, it's over 100 degrees where I live. 🙂' 'Yikes! It's a bit colder up here, that's why I would like to bring some extra firewood to stay warm at night.'
Utterance: 'Oh, I see what you did there. No problem I have plenty of firewood for you buddy. 🙂'
[EX A]:
No