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: 'How are you today? Did you have any preferences on the supplies we will be trading?' 'I am good. How about yourself? I think I would like some firewood to start off with. We like to have bigger fires. What about you?' 'I am good as well. That is good to hear that you like to have bigger fires as we do not care much for that. We would much rather have some extra water.'
Utterance: 'Water is a little important to us too though , if possible maybe we can split that or maybe we can get some more food in replacement.'

SOLUTION: No

PROBLEM: Context: 'Hello there, I'm in a lot of need for some firewood! I'd not be against taking most of it if that's alright?' 'Hi, I need the all food package. I will frequently feel hungry'
Utterance: 'I can give you two of the packages if you're willing to give me all 3 of the firewood. I left mine out in the rain a couple of nights ago so its all ruined.'

SOLUTION: Yes

PROBLEM: Context: 'Hello, I'd like to get all of the water, an extra firewood and 2 of the food' 'Hi there.  That hardly leaves me with anything and doesn't really work for me.  I was hoping to make a campsite feast and get the extra food.  If we can do that, I'd be happy to give you all the water and that extra firewood.'
Utterance: 'I am a big guy, so I will need some more food, how about you give me an extra food while you hold on to two'

SOLUTION:
Yes