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.
Q: Context: 
Utterance: 'Hello. I'm going to do a lot of hiking on my camping trip and need as much water as possible. I'm also planning a bonfire with fellow campers in the area, so I'd like as much firewood as possible. How about I keep the water and firewood and you keep the food?'
A: 
Yes