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: 'Do you have food? I have been trying to hunt but have not really found any animals nearby to hunt.' 'I do actually!  I can give you 3 foods. Would that work?' 'Sure, I can do that.'
Utterance: 'So if I give you 3 woods, can you give me 3 firewoods and 2 waters?'

Answer: No


Question: Context: 'I don't care about the firewood, but I would like food and water the most.' 'you can take water if i get all the firewood and some food' 'I'll take all the water, you can take all the firewood. What would be fair for the food?'
Utterance: 'we have to split it somehow'

Answer: Yes


Question: Context: 
Utterance: 'Hi there! Are you excited about camping?'

Answer:
No