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: 'Well, if you give me 2 firewood and 2 food I will take just one water and you can have 2. I don't want you getting hurt!' 'That could work, but if possible I would like a little more food then, in case I do need to hike to the stream on the last day. I only have a couple of traps with me and those can be unreliable for food. Would it be ok if I take 2 water, 2 food, and 1 firewood?' 'No, if I give up the water I would want 2 of the food because I have extra people coming one of the nights.'
Utterance: 'Oh, I didn't know you had more people on the way. I understand. If I have to stay up in the canyon, I might need to build a fire to keep coyotes away at night. Would my taking 2 water, 1 food, and 2 firewood work for you?'
A: 
Yes