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.

Q: Context: 'how about i get 1 water, 2 food, and 2 firewood since I'll be here so long? because of my leg i likely won't be able to leave anytime soon' 'What about I give you more food in exchange for you giving me more water? I could give you 2 food and you give me an extra water?' 'unfortunately that doesnt work for me. i am afraid i will not be able to discuss this any further my final offer is i get 2water 2food and 1wood'
Utterance: 'can we meet in the middle? if we cannot come to an agreement we both get nothing and we both lose. i am in dire need of the water to keep my leg from having to be amputated. i have children at home i take care of and i can't live without my leg'

A: Yes
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Q: Context: 'Okay, great! What do you need the most?' 'I am looking for food, me and the kiddos need to eat many snacks for energy while exploring hiking trails. What about?' 'Okay, that makes sense. I really need water. I am willing to trade you all 3 of the food if you will give me all of the water. What do you think?'
Utterance: 'I think that sounds okay but I need at least one water please?'

A: Yes
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Q: Context: 'Yes, Hopefully the weather holds up. So I was thinking, i am bringning my two kids along with me, and they will need food, so I was thinking i could take the three foods, and either one of the firewood or water, up to you.' 'I would also like a little extra food for my kids. Maybe we can split it somehow?' 'Ok, I am willing to give you one food, in exchange for two firewoods, that would mean you get 3 waters, 1 food and 1 firewood. you get 5 items, while i get 4.'
Utterance: 'If I only get 1 food, than I would like 2 firewood. So you get 2 food, 1 firewood, and 1 water.'

A:
No
****