TASK DEFINITION: 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.
PROBLEM: Context: 'We can try to figure out a way to split the water and food in the fairest way 🙂. Firewood isn't an issue so it doesn't matter as much. I think to start something like splitting the food 2/1 and the water 1/2?' 'That might work. I can always boil it and I could use the extra food for the kids.' 'Ok so I propose 2 water for me, 1 for you. 2 food for you, 1 for me. Firewood would be, 2 for you, 1 for me? Please give me your opinion if you want to reverse any of that.'
Utterance: 'That would work, the extra firewood would offset the need to have water on hand when I can boil it.'

SOLUTION: No

PROBLEM: Context: 'I do need more food than firewood, If I could get 3 food and 2 firewood. You can get 3 water and 1 firewood.' 'I do need some food. I would like to get at least 1 food. You can still get 3 firewood.' 'I could use water as well, so I could get 1 water, 2 food and 2 firewood'
Utterance: 'I am good at making fire and have a starter so I can give up all the wood.'

SOLUTION: No

PROBLEM: Context: 'My friend is joining me tomorrow so there will be two of us. I really need the extra water so we both can stay hydrated. You can have all the food and 2 of the firewood packs if I get 2 of the water packs. 🙂' 'I understand, but I don't need any extra firewood.  You could have 2 food, 3 firewood, and 1 water?🙂' 'Well I am going to have to think about this deal. Perhaps I can contact my friend and see if he can get some extra water. He is a big eater so the food may come in handy. '
Utterance: 'That would make things better for me.  '

SOLUTION:
Yes