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.

Ex Input:
Context: 'Thank you, 2 packages of firewood would work.' 'So could I get 2 food, if you get 1 food?' 'How many persons are you feeding? I am feeding 2 adults and 2 children.'
Utterance: '2 adults and 3 children, so if I get 2 food and 1 water, you could get 1 food and 2 water? '

Ex Output:
No


Ex Input:
Context: 'Alright. I have a  feeling we will have a deal then. How about you give me two water for a firewood?' 'that sounds like a plan' 'how many firewood you need? Maybe we could also exchange one food for one more firewood?'
Utterance: 'I would appreciate that, I was thinking of asking that! I would not require much in the way of extra food or water but the fire wood would be important!'

Ex Output:
No


Ex Input:
Context: 'i understand friend. i need 2 pack of water and 3 pack of food and 2 pack of fire wood. can you please help me ' 'No way can you have everything, I will need 3 packs of firewood 2 backs of water then you can have all the food' 'i have sicked people and kids so i must need food water fire wood. please help me friend'
Utterance: 'I am sick and have a large family if we cant cooperate together we all get nothing'

Ex Output:

No