You will be given a definition of a task first, then some input of the task.
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 self-need strategy, otherwise output No. self-need is a selfish negotiation strategy. It is used to create a personal need for an item in the negotiation, such as by pointing out that the participant sweats a lot to show preference towards water packages.

Context: 'Hello, what are your preferences for extra supplies?  I am greatly in need of food and water.  We will be doing a lot of activity in a hot, dry climate.🙂' 'I prefer firewood because I will get cold at night. I forgot blankets ☹️' 'Would it work for you, then, to give me the three food and three water, and I can give you all of the firewood?'
Utterance: 'No. Because I brought a water purifier but don't plan on hunting or fishing. So I'd be willing to give up all the water but I want 2 of the food.'
Output:
Yes