Definition: 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.

Positive Example 1 -
Input: Context: 'Yeah, I'm going to the desert so I'm hoping to have enough water. I'm good on food and I hunt for a lot of it anyways.' 'I've never been a good hunter. I wish I had those abilities.' 'I would part with all the food if I could get all the firewood.'
Utterance: 'That seems fair. How about water. How would that be split? I'm very concerned.'
Output: Yes

Positive Example 2 -
Input: Context: 'I really need that extra food for me and my bother. we have one to spare' 'so what is the whole deal here? ' 'you get 3 firewood I get 3 waters and now food I will give you 1 if that is ok🙂'
Utterance: 'and I have to give you more food or not?'
Output: No

Negative Example 1 -
Input: Context: 'Heck yes! I am excited. How about you?' 'I can't wait 🙂 Let's talk about these supplies. I've got hungry mouths to feed, Can I take the food and you can have half the firewood and all the water?' 'Hmm, I need food too. I am willing to split. I will give you 2 food since you claimed it first. Can I have 2 waters then?'
Utterance: 'That's fair, but I have wiggle room on the water, how about I take two food, two firewood and you take 3 water, 1 food, 1 firewood?'
Output: No

Negative Example 2 -
Input: Context: 'You can take two firewood an i can get one. I really don't need much. of that. are you okay with that?' 'I am okay with that 🙂' 'okay an for as the water two for me an 2 for you right? are you sure?'
Utterance: 'Yes, as long as I can get two of the food. '
Output: Yes

Now complete the following example -
Input: Context: ' I would agree to that if I can also have two things of firewood. I am going to need a lot of wood, so I can cook the meals I am making 🙂' 'I completely understand, thank you for compromising with water and food. Wished we had 4 firewoods to divide and share it equaly, may I ask how long will you be camping for? Im afraid I need 2 firewoods as well, maybe we can see who has the greater need? ' 'I am going to be camping for a couple of weeks, so I will need quite a bit. I also realized some additional water would be good, because I have some meals that need me to boil water. Maybe you can have 2 firewood in exchange for me having one of your waters? Then you would still have plenty of water, but also plenty of firewood 🙂'
Utterance: 'So sorry, I just realized you did not agree to the 3 waters in exchange of 3 foods. if you want a water, i will also will need one food. just to make things more fair on my end. If not i am looking at 2 waters, 0 foods, and 1 firewood. But i am willing to compromise for 3 waters, 1 firewood, and 0 foods. and you'll get 3 foods, 2 firewoods, and 0 waters, what do you think?'
Output: 


Answer: Yes