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: 'Hello! how are you? hoping today is finding you well. I was wondering if I can get all 3 of your Firewood, I am willing to trade for all 3 waters. I am camping with 40 kids, its our annual youth camp. its rainy season too, I really want to ensure I have enough dried wood with us. need lots of firewood for the amount of cooking I will be doing, keep the camp warm, and specially to keep those pesky bugs away. what do you think?' 'I could really use the firewood too, it will be very cold where we are going. Since it will be cold, we will not be drinking much water. How about 2 firewood for you, 3 food for me?, ' 'May I ask how many are going camping with you, i would agree, but the needs of children are different than adults. I will need at least 1 food, to ensure I have enough for the kids. '
Utterance: 'We will have 50 adults with us. How about 2 firewood, 1 food, 1 water for you?🙂'

Output: No


Input: Consider Input: Context: 'I'm thinking I'l get 2 firewood, and 2 water and 1 food. I'm not sure what you need, but we can figure it out. ' 'my highest priority is water, i need it to stay hydrated from the camping beers' 'Who doesn't? I need more wood. I'm skinny. I get cold easily. Beer hidrates dude 🙂'
Utterance: 'ha no prob on the wood, its out there in nature so i can do with less of it hows 3 water, 1 food, 0 wood sound'

Output: No


Input: Consider Input: Context: 'I know we need extra food too and some firewood. Maybe a little water but we shouldn't need too much' 'It sounds like we are looking for the same things. I think there are some extra we can share. Do you have an idea about how it can be the most fair? ' 'how about I'll give you 2 food if you give me 2 firewood and 2 of the water?'
Utterance: 'I think that is a fair deal! '


Output: Yes