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.
--------
Question: Context: 
Utterance: 'Hi, I'm hoping we can come to a nice deal. 🙂 I'm most interested in firewood, because it always helps to have extra if your fire goes out.'

Answer: Yes


Question: Context: 'Food is actually my first priority but since it seems to be first priority for us both I thought we could split that. Water doesn't seem to be a priority for you so thought I could take that' 'My first priority is actually firewood.  Food is my second.  🙂' 'Okay so would 2 firewood for you and 1 for me work, and 2 food for me and 1 for you?'
Utterance: 'I can definitely agree to that.  What was your second preference?  Water was my third.'

Answer: No


Question: Context: 'I have circulatory issued due to a heart condition and cold quickly. I would appreciate if I could get at least 2 of the firewood. You can have 2 of the food so you won't get hungry. 🙂' 'I was planning on building a big bonfire for the evening.  There'd be plenty of room if you wanted to join for warmth.  I'm a bit hungry and would appreciate the extra food.  You can have all of the water if you'd like.  If you warm it by the bonfire, it may be useful to soak in to improve your circulation.' 'I get tired to easy so I probably won't be much fun at a bonfire ☹️. I really do appreciate the offer though. I would think the extra food would do you more good for your party. '
Utterance: 'The extra food would be appreciated.  How about if I take just two each of the firewood and food, and you can have the remainder, plus all of the water?'

Answer:
No