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: 'no then u have to give 3 food for me' 'I can have two food then and one wood and you can have the rest of the items' 'bro make it 3 food for me, u can take 3 fire wood  give me to water'
Utterance: 'you are not being fair, bare in mind we have same priority, so if you take all the food you have to give me the wood and water, or you can take all the wood and water and give me the food'
[A]: Yes


[Q]: Context: 'were getting closer - id do 2 water, 2 food, 1 wood' 'I don't know. You are geting more items. That's greed bro :-)' 'I just want to make sure you are getting extra of the items you really need like firewood🙂'
Utterance: 'It's not like I don't need foor. I have two teenagers. Do you know how much they eat?'
[A]: No


[Q]: Context: 'sure, I can give you another one' 'OK, so 2 water and firewood for me and 2 food for you?' 'yes, that is correct'
Utterance: 'great, thanks. Have a fun time!'
[A]:
No