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.

Example Input: Context: 'You can have all the water if I can have all the extra food' 'OK, but first tell me why you need extra food' 'I have 10 people in my group'
Utterance: 'I see. I need more water because I came across some people who were lost and they are very dehydrated.'
Example Output: No

Example Input: Context: 'Doing good! Kinda slow today' 'I just started. Looking forward to your trip? I really need lots of water. I hope you will take that into consideration. ' 'Yup I have water but need firewood to keep warm. My trip is going to be cold.'
Utterance: 'You can have all the firewood you need! I need a bit of extra food too. Would you consider 3 water, 2 food, and 0 wood for me?'
Example Output: No

Example Input: Context: 'That's fine, I'll take 1. I think I have enough with what was originally given. ' 'Sounds good! So I get 3 firewood, 2 food, 0 water; you get 0 firewood, 1 food, 3 water?' 'That's sounds right. Thanks 🙂'
Utterance: 'Cool, I'
Example Output:
No