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: '3 firewood, 1 water, 0 food' 'so I'll get 2 water, 3 food and 0 firewood?' 'Incorrect. '
Utterance: 'In order to make it work I need at least 3 water and 2 food. Or I could do 3 firewood and 2 food and 0 water. I don't see any other way around it'
Yes

Context: 'I have a big party with varying degrees of health and I'm going to need every bit of firewood and food I can get my hands on!  🙂' 'hi, we may be in luck then, i really would like water as i enjoy walking and hiking, i will require some firewood though so i can roast some s'mores' 'How many people are in your camping party?'
Utterance: 'i have 6, and 2 more could be joining us to make 8 '
No

Context: 'Sorry I'm practicing my Spanish for the camp. I do not like the deal very much, but for that we must talk and decide as adults a good deal for both of us. What we want is to enjoy in the camp.' 'By giving you all three food and 2 of the three firewood, you're definitely getting much more than I am.' 'I can give you all the food you need (3), if you give me all the firewood I need (3) and we agree on the amount of water.'
Utterance: 'I can give him all the water he needs (3), and I keep all the firewood I need (3) and we just need to agree on the food.'

Yes