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 have 3 kids with me who are always thirsty but we can negotiate for it' 'Ok. Thats fine' 'Oh great 🙂'
Utterance: 'There is really not much option of evenness since its an odd number package.'

Output: Yes


Input: Consider Input: Context: 'I feel that I am not getting a fair deal. ' 'Then what do you think is fair?' 'I think that I should get 2 firewood, 1 food and 2 water'
Utterance: 'I will let you have 2 firewood if you let me have 3 food, 2 water, and 1 firewood.'

Output: No


Input: Consider Input: Context: 'Hello! camper, how are you? I need us to make a deal where we all benefit.I'm so excited for our camping trip.  I'm most excited about getting to eat food that I normally don't when I am home.🙂' 'I am excited too and looking forward to making a deal that works well for both of us!' 'My main objective for the camp is water, since I have a large family and the amount of water they give in the camp is very small for all my family.'
Utterance: 'I need water also but firewood is my second highest priority item. Maybe you could take more of the water and I could take more of the firewood.'


Output: Yes