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: 'Thats what I wanted, but wait , I just remember that I have to stay a bit longer at the camp . why don't you let me have 3 on food, 2 on firewood and you van have all the water and ' 'ok, your being greedy but lets make the deal' 'hahahah not too greedy, but yes we can make a deal🙂'
Utterance: 'you gave me one on each, thats unfair man!'

Output: Yes


Input: Consider Input: Context: 'Hello there...! Are you excited for the camp' 'Hey, I am really excited! 🙂'
Utterance: 'Wow.. Cool '

Output: No


Input: Consider Input: Context: 'Hello there. I do not have a large family so i will give up on the food but i do have a medical condition where i have trouble regulating my temperature and need lots of fluids' 'Okay, I need firewood to stay warm and cook food. I'm willing to give up some water for more firewood.' 'Unfortunately i need the firewood. My body has trouble maintaining heat. I need as much as i can get ☹️'
Utterance: 'Okay, well if you need water and firewood, that only leaves food. If you can part with extra food, here's what I'm proposing'


Output: No