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'm sorry to hear that! But can you spare 1 for me since you probably don't need all the water.' 'Sure that sounds fair. Thank you. Besides water what do you need for your trip?' 'great. Then can you give 2 food instead? We eat a lot and need more to go through the night...'
Utterance: 'Ok I understand. Since you're willing to give me 2 water I can give you 2 food. Would it be ok then if I ask for 2 firewood? The kids were talking about making s-mores'

Output: No


Input: Consider Input: Context: 'Yes! I am also going with my family. My husband and I are essential workers but his hours all got cut. I got laid off from my job for part of the time.' 'oh man that sucks ☹️! I know Congress is currently debating all of the unemployment stuff too. Where do you plan to be going camping?' 'We didn't get unemployment or a stimulus check. ☹️ We are planning a trip to Missouri, Lake of the Ozarks. Our younger children have been cooped up so long we are hoping to let them get some sun and swimming in!'
Utterance: 'That sounds nice, maybe everyone just needs some fun to stay positive about everything. We're going camping along a lake and plan to do a lot of fishing. My husband got these filtration thingies so that we can drink the lake water but I don't really trust them. This will be my kid's first ever camping trip so we're super excited to make it fun for him.'

Output: No


Input: Consider Input: Context: 'okay friend. In my team old age sicked peoples and kids are there so i need some extra package.' 'Okay friend. Which item do you need the most?' 'I need 3 pack of fire wood and 2 pack of food and 2 pack of water'
Utterance: 'But If I will give you these items I don't get enough package friend.'


Output: Yes