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: 'I need the firewood and the food, you can have all the water.' 'no i need firewood to always keep myself warm.'
Utterance: 'So do I, I have health issues.  I can give you one firewood, if I get all the food. '

SOLUTION: Yes

PROBLEM: Context: 'i willing to swap some items for others, but we have to work togeather on it' 'ok friend how this deal 2 pack of all.?' 'two pack to who you or me?'
Utterance: 'for me. 2 pack of water 2 pack of fire wood and 2 pack of food. '

SOLUTION: No

PROBLEM: Context: 'Ok, other than food I could use some firewood. Maybe you could take 2 food and I could take 2 firewood?' 'sure, but i will get what then?' 'How about you take 2 food, 1 firewood, and 1 water?'
Utterance: 'no it is not enough for me, i need more water'

SOLUTION:
Yes