TASK DEFINITION: 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.
PROBLEM: Context: 
Utterance: 'HI. I'd love to get 2 additional packs of firewood. The weather forecast was for much warmer weather here and I just didn't bring enough with me. I also left my additional sweatshirt at home. I'd be happy to give you one additional water and two of food.  🙂🙂'

SOLUTION: Yes

PROBLEM: Context: 'Good how are you' 'I am doing quite good. I enjoy camping. I however did not bring enough food.' 'Ok I'm sure we can work it out because I know I need extra water and firewood. Do you have any ideas on how to divvy up the extra supplies?'
Utterance: 'I would need some firewood as well, as I need it to cook the food. I was thinking maybe you can have all the water and I have all the food.'

SOLUTION: Yes

PROBLEM: Context: 'How about you take two water and 1 food and 2 firewood?' 'That's kind of what I was thinking.  That would work for me.' 'OK, great, I forgot my fishing pole so the extra food will really help!'
Utterance: 'The extra firewood will help out keeping the family warm in case the temperature drops.'

SOLUTION:
Yes