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.
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Question: Context: 'I will want to get some extra supplies before I go. ' 'Same. My family is coming with me so I want to make sure we are extra prepared' 'Me too. We invited a lot of extra friends'
Utterance: 'I am hoping we have enough food. I'm worried we might run out so I'd like to get some more '

Answer: No

Question: Context: 'oh my are you going somewhere cold? I could use the water, I am going on a charity event with kids from the Make A Wish foundation. Its going to be their first time!' 'Ok I will give you 3 waters if you give me 3 firewood' 'sure i can do that, what about the food then? how much food would you need for the tip? can you hunt where you are going?'
Utterance: 'I am up to u '

Answer: No

Question: Context: 'Hi! How about I receive 3 food, 2 firewood, and 1 water?' 'I can't do that. It would leave me with no food at all. How about I take 2 food, and 1 firewood, and 1 water?' 'I really need more food than 1. I am worried about running out. I could take 2 food, and give you 1 food, 2 firewood, and 2 water.'
Utterance: 'That is a very generous offer, which I very much appreciate. But I am also worried that I could run out. What if I take 2 foods, give you 2 firewoods, and 1 water? '

Answer:
Yes