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: 'Hello!  I'm going to be heading out on a big camping trip and will need to take some extra supplies.  Are you going camping as well?' 'I am also going camping! What do you think you're going to need the most of? What are your preferences?'
Utterance: 'It's going to be hot during the day where I'm going so I'll need some extra hydration.  So water is my main priority.'

SOLUTION: Yes

PROBLEM: Context: 'I can't take cold and would badly need to have more firewood.' 'I need more firewood to keep my food going.' 'I get it, in that case I'' take additional packages of food.'
Utterance: 'I don't think so, because I need additional packages of food in case there is an emergency.'

SOLUTION: Yes

PROBLEM: Context: 'Yes, I would be willing to let you have all the firewood for 2 of the cases of water.  How much food were you needing?' 'I like your water and firewood arrangement. Can I have 2 of the food since you're getting 2 of the water? ' 'Let me think on that. I know there won't be much for berries or small animals to hunt for.  Is where you are going have much available for you to hunt and scavenge for?'
Utterance: 'It might but with the summer season hunting isn't exactly legal at the moment. I tend to camp in remote areas so going to the store for more food isn't really an option. I've already let you have extra water so I don't think it's too far of a stretch to let me have some extra food.'

SOLUTION:
Yes