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: 'Aww I'm sorry to hear that, it sounds like it might be better to have her bring her own food. I'll be bringing my teenage son so it would be awesome to get any extra food for him that I can. You know how they be! 🙂' 'What about I take 2 of the packages and you take 1? I know teenagers also drink a lot of water haha 🙂' 'He definitely does drink a lot of water, but he's in a growth spurt so 2 would be ideal. I'm happy to give up all firewood in exchange for the extra food!'
Utterance: 'okay that sounds like a better deal then! I will take all the firewood and 1 food, and you can take the 2 food packages'
No

Context: 'I am well; I love going camping. I really enjoyed my time in Boy Scouts and look forward to practicing what I learned to good use' 'That is awesome. I brought extra firewood if you need some. My brother forgot to pick up the water when he left town and now is 15 mins away. Do you have any you give?🙂🙂' 'I would love some extra firewood; however I need some extra food too. I have diabetes and it's important that I have more food for later'
Utterance: 'O wow.☹️ I'm sorry to here that. I can give you all my firewood and a food if you can give me all your water. '
No

Context: 
Utterance: 'Hello, what are your preferences for food, water, and firewood?'

No