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.

Input: Consider Input: Context: 'I was going to say, the fire would be probably one of the few things I would be interested in! I love being warm.' 'Well you can take all the firewood if it will help, would it be ok if i get all the food in return?' 'That works for me. How would you like to divide the water?'
Utterance: 'I am ok with you taking two waters since you are new to camping, does that seem fair to you?'

Output: Yes

Input: Consider Input: Context: 'Hi, ' 'Hello. What sort of supplies are you looking for?' 'Well, I really dislike camping :( and am looking to make the trip as comforting as possible. I would like to gather 2 food, 2 firewood and 2 water please. '
Utterance: 'I need a lot of food and I get cold easily. What is your top priority?'

Output: No

Input: Consider Input: Context: 'no i think i need 2 waters' 'That will be very difficult for me. I have a condition that requires water all the time.' 'Same thing here. Also i only need 1 food so can i get 2 waters'
Utterance: 'Let me see the best offer for us then. I hope you will be okay.'
Output: Yes