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.

Input: Consider Input: Context: 'It took a while to load but good.' 'Let's talk about how we can split the camping supplies' 'Ok I think we should split evenly'
Utterance: 'yes we should come to a fair deal, what are your priority items?'

Output: No


Input: Consider Input: Context: 'I have an idea. I could give you 3 firewood and you give me 3 water and 3 food. ' 'That would be great but I could find myself in need of some extra water. Don't want t get dehydrated from all the dancing! Could I trade you one of the firewood for 2 of the water?' 'I see. How about you get 2 firewood 1 water 1 food. And I get 1 firewod 2 water 2 food?'
Utterance: 'I think that sounds fair. So I would get 2 firewood, 1 water and 1 food. You could get 1 firewood, 2 water, 2 food. Is that correct?'

Output: Yes


Input: Consider Input: Context: 'Oh no, I'm so sorry to hear that ☹️ Let me ask about the food first then, would you be willing to give me the 3 packages of that? I am going to have a lot of people with me and we won't be near any stores at all.' 'if i give you all the food items, will you give me the firewood?' 'I was thinking maybe you can have 2 firewood and 3 waters. And I could take 1 firewood and 3 food?'
Utterance: 'that sounds fair'


Output: Yes