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.

Input: Consider Input: Context: 'hi' 'Hi how is it going?' 'It took a while to load but good.'
Utterance: 'Let's talk about how we can split the camping supplies'

Output: Yes


Input: Consider Input: Context: 'Well I was thinking you could get all the extra firewood and work on the group meal and bonfire for friday night' 'I like the sound of getting the firewood, but I can't just accept no food or water.' 'I'll give you one of the extra food so you have a little extra to cook for everyone but I'm really gonna need all that extra water, it's going to be really hot this weekend and the folks at the capsite get to sit in the shade all day'
Utterance: 'Now we are making progress. But come on, I will need at least one water to make sure I'm hydrated. I wouldn't want to get heatstroke out in the woods.'

Output: No


Input: Consider Input: Context: 'oh nooo, that's terrible. do they know where they left them?' 'I think they went to Chicago.  I really needing replace our lost water and sleeping bags.  I see there are some extra supplies to share.  I could really use the water and firwood.  🙂' 'oh yeah, you definitely do. we have all of our stuff and mostly wanted to hike and have picnics during our camping trip '
Utterance: 'Great. If you mainly doing picnics do you want 3 Food?   I could use the the supplies.  🙂'


Output: No