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: 'Agreed.  Your fun trip could turn into something quite dangerous without that hydration.  ' 'Of course, that won't be fun. ☹️ So we have agreed' 'Mostly - since we cannot split the water 1-1, do you mind if I take the extra one? 🙂 '
Utterance: 'That's fine, you might need it more.'

Output: No


Input: Consider Input: 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 🙂'

Output: No


Input: Consider Input: Context: 'That sounds great! What do you prefer with the additional packages for camping?' 'Yes I do! I was to ask you that in this conversation, will you be Okay with any agreement?' 'Let's see what we are both thinking and negotiate from there. What are your first thoughts on the additional camping packages?'
Utterance: 'I need all the food packing and some basic needs for the camping, may I know about your first though on which you need additional package?'


Output: No