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: 'Hello! I believe that we can help each other here.' 'hi how are you, what help you need?'
Utterance: 'Lets strike balance like 1/2 2/1 3/0'

Output: Yes


Input: Consider Input: Context: 'Hello, how are you? 🙂' 'I'm good, how are you doing today?'
Utterance: 'I'm doing great!  I'm on the first camping trip with my five children.'

Output: No


Input: Consider Input: Context: 
Utterance: 'Hello!'


Output: No