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: '2 food , 1 firewood ,2 water for me is it ok?' 'not fair at all☹️' 'then what will do, '
Utterance: 'if you take two food, then I take all the wood and two two water and one food'

Ex Output:
No


Ex Input:
Context: 'doesn't really seem fair for you to get all the firewood. I would like to have at least one because then we're completely in the dark.' 'You get lots of water and food for your children, I am cutting back on my goals by giving up energy which means I have spend more time outside hiking.  I do need to stay warm' 'yes which is why you have two firewood. I think it is fair for me to get at least one. If food is so important to you then I'll give you two food. but we would be in the dark'
Utterance: 'I suppose that's fair enough.'

Ex Output:
Yes


Ex Input:
Context: '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' 'you also not fare,you also not  ready to give a give offer, give me 3 food , remaining one firewood one water 3 1 1' 'no, I think I will just walk away'
Utterance: 'bro u also not offer a good deal'

Ex Output:

Yes