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 Q]: Context: 'I like to eat.  I think extra food is good.  Are you willing to let me have all three food packs? 🙂' 'I would want to keep at least one packet of food for myself, unless you want to just swap 3 firewoods for 3 packets of food, to keep it simple?' 'I like your plan.  It is simple. I will agree to that.'
Utterance: 'So all that is left is water, i guess i should atleast drink alot of it if i wont eat much haha 🙂'
[EX A]: No

[EX Q]: Context: 'So, let me know how much exactly do you want of each item' 'I would like 2 packages of food and 2 packages of water.' 'In that case, I can take 2 packages of firewood. So , it would be a fair deal. I can share with you in case you have the need.'
Utterance: 'Okay, that is a fair deal then. It is settled.'
[EX A]: Yes

[EX Q]: Context: 'That's not going to work for me at all, I would like 3 packages of water, 2 packages of food, and 1 package of firewood' 'That would leave me with no water. I would like 1 package of water, 2 packages of food, and 2 packages of firewood.' 'You'll have some water, this is for extra.  Would you take 2 packages of food and 3 packages of firewood in exchange for me getting 3 packages of water and 1 package of food?'
Utterance: 'Yes, I would.'
[EX A]:
No