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: 'Haha yup me too. I have a teenage son who eats about 5000 calories a day. Okay, I think the most fair option is one of takes 2 firewood and 1 of the other two items. I don't care who.' 'Sure. How about you take 2 firewood, and 1 food and 1 water?' 'That's fine with me. This should be a great weekend to get out.'
Utterance: 'yes sounds good! hope it doesn't rain'

SOLUTION: No

PROBLEM: Context: 'I would really like some extra firewood to keep the chill off on those cold  nights.🙂' 'Me too. It has been rather cold lately! But I am also really interested in water.' 'I don't need the water as much.  How about I get 2 firewood and you get 2 water?'
Utterance: 'I would prefer all the water. You can have all of the firewood.'

SOLUTION: No

PROBLEM: Context: 
Utterance: 'HI, my heater hasn't arrived yet and we are in need of extra firewood. Plus, we're camping where there is 6 months of darkness, in Sweden. 😮'

SOLUTION:
Yes