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: 'Sure you can give me firewood in place of water' 'Thank you 🙂 That works for me. I'm also in my first trimester so I'll need a bit of extra food since I'm feeding my little one. Is that alright with you?' 'Woah... You can take more food as well'
Utterance: 'Thank you dear! :D I really appreciate that. Are you okay with how everything is divided up then?'

Output: Yes


Input: Consider Input: Context: 'Hello. How are you?' 'I am good. I am pretty excited for the trip this weekend. what about you?' 'Very excited. It will be fun.'
Utterance: 'Yes, Hopefully the weather holds up. So I was thinking, i am bringning my two kids along with me, and they will need food, so I was thinking i could take the three foods, and either one of the firewood or water, up to you.'

Output: No


Input: Consider Input: Context: 'I can give you 3 wood packages if I can get 3 water and 2 food. So you will receive 3 wood and 1 food. What do you think?' 'I would like 2 wood, 1 water and 1 food. You would get 1 wood, 2 water and 2 food.' 'I don't need any wood. Do you have any alternatives?'
Utterance: 'I think my original offer is fair. I want you to have your most desired item (wood) and I get mine (water).'


Output: Yes