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 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: 'ok, if i get all 3 extra firewood, I'd be fine with getting 1 extra water while you get 2? food is a really low priority for me' 'Same here as well as I have carried enough but yes, I need firewood as most of y food requires cooking and specially my kids prefer having food hot.' 'Ok thats fair, I would prefer to have more firewood since I'm awful at collecting firewood while out. But we could be a more even split of it all. 2/1 for both. Do you need more water or more firewood?'
Utterance: 'I need more firewood, I can maage with 1 additional package of water.'

SOLUTION: No

PROBLEM: Context: 
Utterance: 'Hi, how are you today?'

SOLUTION:
No