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.

Example Input: Context: 'deal' 'Awesome! 🙂 What else will you do on your trip?' 'i hunt hehe'
Utterance: 'Nice. We will do some fishing and hiking.'
Example Output: No

Example Input: Context: 'That might work. What reasons do you have for needing those?' 'I want to make smores and a nice dinner' 'I feel like I might need more firewood, I'm staying in the desert and it gets cold at night.'
Utterance: 'I could do one firewood and all the food?'
Example Output: No

Example Input: Context: 'Hello! I'll be camping soon and need to get my hands on some supplies. The food is what I need the most.' 'I'm glad you are joining the camp! I will be bringing my girl scout troop for some badge earning opportunities.' 'Oh my. A whole troop of girl scouts will probably be bringing lots of food with them to share, and plenty of people around to collect firewood. It is going to be just me and my son on this camping trip, his first time.'
Utterance: 'We were planning on getting our outdoor cooking badge by making  a big meal over the campfire tonight. I wll need plenty of firewood for that, but I can manage with only one food.'
Example Output:
No