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.

Q: Context: 'Hello, are you excited for your camping trip?' 'hii'
Utterance: 'Do you have an idea of how you'd like to split up the extra supplies?'

A: Yes
****
Q: Context: 'I can't swim too. I think two waters will help me to survive on this trip and I will need at least two firewood to make fish or other food items for my family. ' 'You don't need this water to swim. You can take two of the food if you're worried about food. I will take two water and two firewood since I have a large family to nourish and keep warm. Your initial suggestion of 3 waters and firewood is laughable. Please provide a realistic compromise.' 'If I take two waters, 1 firewood, and 2 food supplies, this will help me during the trip. It seems as if you are more skilled than I am on a camping trip. Please consider my request☹️'
Utterance: 'LOL - not a chance. You're going to have to give me more than that. I am more skilled and thus need firewood. How about this...I will take 3 firewood and 2 food. You can take all the water because you're so non-skilled in the wilderness. I am going to hunt for my food, but again I have a large family. I am not considering your request at all. We will need to come to a decision relatively soon.'

A: Yes
****
Q: Context: 'Cool! 🙂 It's a good number, we are planning on 10, but you never know on these. What I do know is this group loves to eat and hike, plus it might get a little chilly.' 'yeah, i understand that. we are all apart of a weigh watchers group ao we' '😮 Been there and done that. It's great when you can start to see the change in their self esteem!'
Utterance: 'yes, for sure starting to see results, id be more than happy if i could get two or three waters and at least one or two firewood '

A:
No
****