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 can do that for you, in on a diet anyways and already have a stock ive been working on since fall' 'oh well that's fantastic, so let me know what your deal is' ' 3 on food, 1 on firewood and 1 on water😮'
Utterance: 'Thats what your deal is or my deal, cmon man!'
Example Output: No

Example Input: Context: 'I see.... Well we really would like the firewood too though. Could you reconsider it makes a big difference for us.' 'Sorry I will only consider a deal if I can get at least two fire wood.' 'Well if that is the case then I want 1 Firewood 3 waters and 2 Food then. '
Utterance: 'That is kind of excessive though.... 6 - 3 of an item share? '
Example Output: Yes

Example Input: Context: 'Sounds good, I need food the most, what is your most needed item?' 'my item is food too.' 'Ok, other than food I could use some firewood. Maybe you could take 2 food and I could take 2 firewood?'
Utterance: 'sure, but i will get what then?'
Example Output:
No