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: 'Hello! I believe that we can help each other here.' 'hi how are you, what help you need?'
Utterance: 'Lets strike balance like 1/2 2/1 3/0'

A: Yes
****
Q: Context: 'You can find more wood in the forest but I'm going somewhere where there's not a loot of trees ☹️' 'That makes sense. What if you took 2 firewood in exchange for 1 additional food?' 'you can have 3 food'
Utterance: 'Alright🙂 From what I understand, that means that you would take 3 firewood, and I would take 3 water and 3 food. Is this your understanding as well?'

A: No
****
Q: Context: 'Well, if I have to catch fish to eat, I'll need the firewood to cook them.' 'ok, so what at I get 2 firewood and you get 1 so you can cook your fish.' 'I'll really need 2 firewood if we do this.'
Utterance: 'I need the firewood also because this campsite is bare and the little bit of wood I did have a raccoon came and stole it.☹️'

A:
No
****