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.

Q: Context: 'Sure, my number one item if food if you can spare any.' 'It'd be nice if we can both get an even split right?' 'Well some needs are higher than others.  I need more food but I can give up some firewood or water.'
Utterance: 'I think we can start off with 3 water for me and 3 food for you'

A: No
****
Q: Context: 'I'm doing well. I'm very excited about our camping trip!' 'I am too! I have a rather large family and we are looking forward to getting out for some time away!' 'How nice. I am bringing my daughter and her girl scout troop. I am the co leader.'
Utterance: 'Oh that'

A: No
****
Q: 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?'

A:
Yes
****