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: 'No I need more firewood' 'Okay, can I ask why the firewood is important for you? 🙂' 'You can find more wood in the forest but I'm going somewhere where there's not a loot of trees ☹️'
Utterance: 'That makes sense. What if you took 2 firewood in exchange for 1 additional food?'
Example Output: No

Example Input: Context: 'Well fortunately if you are camping that won't be too bad. You'll blend in with the wilderness.' 'My friends will run away. I will not be comfortable either. So how do we split what we have?' 'If they're true friends, they won't. I'll take 2 firewood, 2 water, 3 food.'
Utterance: 'That is very unfair ☹️'
Example Output: Yes

Example Input: Context: 'no i think i need 2 waters' 'That will be very difficult for me. I have a condition that requires water all the time.' 'Same thing here. Also i only need 1 food so can i get 2 waters'
Utterance: 'Let me see the best offer for us then. I hope you will be okay.'
Example Output:
Yes