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: 'We will be in an area where there is not much firewood to collect. You have to bring it in.  We hope to cook with it and keep warm in the evenings.  I am hoping to take at least 2 firewood packages.' 'I will give you water. Firewood also need for me because of my health condition i want some warm.' 'Will one extra firewood be enough to keep you warm?'
Utterance: 'I'm not sure why you entered a deal we did not agree on.  I can leave you the three food and one firewood.'
Example Output: No

Example Input: Context: 'bro u also not offer a good deal' 'one food, three wood.' 'bro it is not a fair deal give me 2 food, one firewood 2 water'
Utterance: 'if you think I am not being fair can I have what you are asking for?'
Example Output: Yes

Example 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? '
Example Output:
No

