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: 'Okay, but water is important to me because I have health issues. So I drink more water for save my health.' 'Okay! You can have all the water. I want all the food.' 'yeah sure, I will share with you all the food. What is about firewood?'
Utterance: 'You can have two if I can have one if you're okay with that.'

Output: Yes


Input: Consider Input: Context: 'Hello. I'm going to do a lot of hiking on my camping trip and need as much water as possible. I'm also planning a bonfire with fellow campers in the area, so I'd like as much firewood as possible. How about I keep the water and firewood and you keep the food?' 'That doesn't work for me. I will also need extra water because I drink a lot. How about we start by saying you get the firewood, and I'll take the food?' 'OK, but how do we split up the water? Because it sounds like we both need some. What if you take all the food and I take all the firewood and then I get two waters and you get one extra?'
Utterance: 'I would prefer to have 2 waters since I agreed to give you all the firewood.'


Output: Yes