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 Input:
Context: 'so water, firewood and food for you, and water food and firewood for me. what do you suggest' 'I'm not much of a food fan knowing that without firewood you die of hypothermia if wet, one can survive without food/ with little food for months' 'so let's do this quick, how about 2 water for you, 1 water for me, 0 food for you, 3 food for me'
Utterance: 'good excellent choice'

Ex Output:
No


Ex Input:
Context: 'That deal is not favorable for me' 'Feel free to counter, but I'm not loving anything that I've gotten so far.' '1 firewood, 2 water, 1 food for me which should mean we each get 2 priority packs -'
Utterance: 'Feel free to counter, but I haven't liked anything so far.'

Ex Output:
No


Ex Input:
Context: 'I was thinking about 2 units of firewood and 1 unit of food and one unit of water, what are you going to be needing this for?' 'I can do that. I am going camping in the fall with my family so we need a lot of food. We're camping by the lake so if you want I can give you an extra unit of water.' 'sure thats sounds fair, so that would leave you with two units of food one unit of firewood and one unit of water then?'
Utterance: 'That sounds fair to me. Have fun with the kiddo!'

Ex Output:

Yes