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: 'Hello, I am very cold and need food and wood to remain warm. How about I get 3 firewood, 3 food and 1 water?'

SOLUTION: Yes

PROBLEM: Context: 'Hi! How about I receive 3 food, 2 firewood, and 1 water?'
Utterance: 'I can't do that. It would leave me with no food at all. How about I take 2 food, and 1 firewood, and 1 water?'

SOLUTION: No

PROBLEM: Context: 'Grilling is so much fun!  We left our grill at home so we can't really do that.  I will trade you some food for some water if you would like?' 'sure that sounds fair' 'Ok, do you have any interest in any fire wood?'
Utterance: 'I do need firewood, we cook over open flames. 😮How you get 2 water, 1 food and 1 firewood?'

SOLUTION:
Yes

