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.  I'm actually not doing too well.  There have been a few problems and I will need some of the extra packages.  I'll need two of the waters, 2 of the firewood and 2 of the food.' 'I'm sorry to hear that you are not doing well.  I've also have some issues.  On the way up to the camp site, all of my clean water spilled in the car.  I was really hoping to be able to get all of the available water.  Why aren't you well?  I hope it's not serious.  ☹️' 'Oh, that's terrible.  I'm sorry that happened.  I need the water for my child.  They seem dehydrated and disoriented.  My husband has also caught a cold and has been having chills.  I thought the extra firewood would help him feel better.'
Utterance: 'Oh my gosh.  You are not having an easy trip.  If your children are dehydrated and disoriented, perhaps you should get them to emergency care immediately.  I would like to provide you will all of the water in the meantime, but that would leave me with none at all.  I wouldn't have your husband out of the tent with chills.  Perhaps you should keep him bundled in your cabin.  I forgot my portable propane grill - so I would need some firewood.  How about I take 2 waters, 1 firewood and all of the food?'

Output: No


Input: Consider Input: Context: 'Yes I think that sounds fair.' 'So if I take 2 foods and 1 firewood, you take 1 food and 2 firewood. What would be fair for water?' 'What if I take two waters and you take one water then?'
Utterance: 'I think that sounds fair, since you compromised on food. Sounds like a deal!'

Output: Yes


Input: Consider Input: Context: '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?' 'You can have two if I can have one if you're okay with that.'
Utterance: 'My place is so cold, so I want all the firewood for save my children from cold.'


Output: No