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.

Example Input: Context: 'I also need water because we plan to do a lot of hiking. What about you?' 'Wow, I think we planned the same activities for our trip. I need water too 🙂' 'Haha well we'll be seeing a lot of each other then. Is water your number one or two priority?'
Utterance: 'Water is my second priority item. I am sure we can work out a fair deal. What do you propose?'
Example Output: Yes

Example Input: Context: 'Hi, what is your highest priority item?' 'I would love to have extra food for my trip, bringing the family! how about you?'
Utterance: 'I agree, it will be tricky to find extra food while camping. I'm sure we can figure out something that works for both of us... the water is also very important to me because it's supposed to be hot. There is plenty of wood where I'm going, so you can have the firewood. Would you be willing to take 3 firewood, 1 food and 1 food?'
Example Output: Yes

Example Input: Context: 'I think our dealing is going good. You take all the firewood.As I already said, I have some health issue. Can you help me with the food?' 'Sounds good I will give you the 2 packages of food.🙂' 'So nice of you !! Now can you summarize your needs?'
Utterance: 'I will need 3 packages of firewood. 1 package of food and 1 package of water. What are your needs?'
Example Output:
No