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: 'I have 10 people in my group' 'I see. I need more water because I came across some people who were lost and they are very dehydrated.' 'I need 2 firewood because it gets below freezing at night'
Utterance: 'Oh I wouldn't want for you to freeze☹️ It also gets cold where I am, so I need 2 firewood as well.'

Ex Output:
No

Ex Input:
Context: 'It's been so cold these last few days, I'm worried that I didn't bring enough wood for the next few nights.'
Utterance: 'That is unfortunate. How about I give you are my firewood for all your food?'

Ex Output:
No

Ex Input:
Context: 'I am okay. How about I give you one and half then I get some firewood from you?' 'No I need at least 2 waters. But I am willing to give you all 3 foods, if I get all the firewood. Does that work for you?' 'Okay I will give you 2 waters. I actually need more of firewood. If I can get 2 I will be glad.'
Utterance: 'Well I really need the firewood because I have small kids with me and it would be hard for me to get some free time to get the firewood, but I would be willing to give you 2 firewood since I get two waters. What are your thoughts about the food?'

Ex Output:
No