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 uv-part strategy, otherwise output No. uv-part is a selfish negotiation strategy. It is used to undermine the requirements of the opponent. For instance, suggesting that the opponent would not need more firewood since they already have the basic supplies or a suggestion that there might be a store near the campsite where the opponent can get the supplies instead.

Example Input: Context: 'Alright, I think that's agreeable to me too. I really appreciate it, that means a lot to me and my family.' 'How many family members do you have? ' 'Me, my wife and our two kids.'
Utterance: 'I could use 1 package of firewood if your family has other heating options like a butane food cooker.'
Example Output: Yes

Example Input: Context: 'I have a medical condition that causes my veins to close up when I get too cold. I will thus need the 3 firewood.'
Utterance: '☹️Oh, that sounds awful. Are you sure you need all three packages of firewood?'
Example Output: Yes

Example Input: Context: 'I'm hoping so too. What's most valuable to you?' 'Water, what about you? ' 'Food, but I definitely do need some water, too. Can you live with taking 2 waters?'
Utterance: 'Yes, can you live with two foods? '
Example Output:
No