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.
--------
Question: Context: 'I can give you more food if you like but I really need the water' 'It seems we both need the water so If you want 2 water, I would need all the food and firewood as well.' 'How about this I give you 1 package of  water, 2 packages of food, and 3 packages of Firewood.  You get the majority of my items'
Utterance: 'I guess that could work and seems pretty fair for all.'

Answer: Yes


Question: Context: 'Well i do not need the water at all as i have a distiller' 'And I have plenty of food as I'm the only over eater of the group.' 'OK how about 2 firewoods me 2 foods me 1 firewood you 1 food 3 water'
Utterance: 'If I'm only getting 1 firewood let me have 1 extra food then. So you can have the 2 firewoods, plus 1 food. I'll get 1 firewood, 2 foods and 3 waters. You get the most important item so I'm thinking that's fair.'

Answer: Yes


Question: Context: 'Hi, What is decision about packages?' 'I was thinking I will take 2 food, 1 water, 2 firewood'
Utterance: 'I would like to share 1 food, 1 water and 2 firewood with you. Can you accept the deal?'

Answer:
No