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.

Q: Context: 
Utterance: 'I want to make sure I'm well prepared for camping. How would you feel if I took 2 water, 1 firewood, and 2 food?'

A: No
****
Q: Context: '☹️ I forgot most the food I was going to bring and only have enough for less than half the planned trip.' 'I understand. I guess we are in the same predicament. I have two kids with me though and they are hungry too. How long are you camping for? We are here a week.' 'I let my two girls bring their friend. Its their first overnight trip for more than a night. We also had a week planned.'
Utterance: 'My kids really eat a lot. But then yours probably to as well!'

A: No
****
Q: Context: 'I am working hard around the camp and getting hungry!' 'You came here to work? I’ve been taking it easy. ' 'LOL, I mean setting up the tent and clearing the area for a campfire. I'll take a break now.'
Utterance: 'Sounds good.  I suggest you make a fire and relax. '

A:
No
****