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: 'Hello there. I'd like to discuss making a deal.' 'yes, what would you like?' 'I was thinking I will take all the food and water. You can have the firewood. '
Utterance: 'that's not going to work for me. I need to keep at least 2 foods and 1 firewood but you can have all the water.'

Answer: Yes


Question: Context: 'Absolutely. My second most needed item is food so that works out well.' 'Well I am happy to give you all my food in exchange for all your water.' 'We can do that! How do you want to split up the firewood?'
Utterance: 'It's an odd number so someone has to get 2. But in order to make it fair if one of us takes two then the other should get one of the lower priority items. What do you think?'

Answer: Yes


Question: Context: 'so you want two firewoods and three waters and I get everything else? ' 'That sounds good to me!' 'I really need at least two firewoods to cook with though, or one water. How can we make this work?'
Utterance: 'I could give you two firewood, if I could still have my three waters and then 1 food.'

Answer:
No