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 Input:
Context: 'Agreed.  Your fun trip could turn into something quite dangerous without that hydration.  ' 'Of course, that won't be fun. ☹️ So we have agreed' 'Mostly - since we cannot split the water 1-1, do you mind if I take the extra one? 🙂 '
Utterance: 'That's fine, you might need it more.'

Ex Output:
No


Ex Input:
Context: 'you consider me giving one of your water package and collect food package, if you are lucky you can get liquid foods too🙂' 'I don't like food. my stomach is always full. I only drink water since im thirsty most of the time.' 'yeah i can understand buddy, but the fact is we can share some items. you are not getting food packages and getting packages alone which you preferred. Try some food packages too'
Utterance: 'Okay I agree what about this deal. I get 2 water, 1 firewood ,and 1 food package.'

Ex Output:
No


Ex Input:
Context: 'Well, we have extra food too. How about I take 2 water, 1 food, and give the res (1 water, 2 food, 3 firewood) to you?' 'That's super thoughtful of you. However, I really need two waters so I can provide for everyone. Once we have enough food and fire we can always go get water from the stream and boil it for the kids.' 'Of course there is no garuntee you will catch anything, if you want 2 waters I'd prefer to take all the food just in case'
Utterance: 'I would certainly give you all of the food if I could have 2 waters and 1 firewood.'

Ex Output:

No