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: '😮Sound good enough but since you know i can not do without having anything to sustain me whenever i am thirsty then i suggest you are free to take TWO of the water and since your food has also been stolen by bears and you don't make much left, then you can have the TWO of the food items too and leave the THREE firewood for me with ONE food. How does that sound? 🙂' 'I think we are getting very close to a good deal. Would you be willing to give me ONE firewood in case the stuff I have gets wet?' 'I strongly agree and shall we call it a deal now? 🙂'
Utterance: 'Like I said, we are close but I really would feel better with just one of the firewood. I'm afraid of not being able to build a fire. If you really need the firewood, however, then I would take one additional item of EITHER the water or food instead.'

A: Yes
****
Q: Context: 'Well, I think that for us staying warm is more important than having extra food. What if I took extra fire wood and you took extra food?' 'That could work, were not really looking to have a big fire' 'Where do you stand on water? We're low , and may need extra in case the fires go out of control'
Utterance: 'I do need some myself as well'

A: Yes
****
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
****