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 would like 2' 'I will  be happy to let you have 3 packs of food , but I need 2 packs of firewood' 'I am also letting you have all 3 packs of water. I think we need to consider how to split the firewood in a fair manner.'
Utterance: 'What do you think is  a fair deal with the firewood'
Example Output: Yes

Example Input: Context: 'okay is 2 food 1 firewood okay for you while i get 1 food 2 firewood and 3 water' 'I'm going to need some water as well. How about 2 food, 2 water and 0 firewood for me?' 'okay i agreee with you so u can have 2 food 2 water while i get 1 food 1water and 3 firewood.is that a final decision?'
Utterance: 'That seems fair to me. This was a very nice negotiation, thank you 🙂'
Example Output: Yes

Example Input: Context: 'I would say between firewood and food, eating and comfort is important to me' 'I can understand that. I know I really need the food the most. I'm already worried I'm going to run out. I also have blood sugar problems, so I cannot run out ☹️' 'Thats fine. If you want you can have 2 foods and I get 2 of the fire wood. Sounds fair?'
Utterance: 'And I would take 3 water? '
Example Output:
No