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.

Ex Input:
Context: 
Utterance: 'I have a medical condition that causes my veins to close up when I get too cold. I will thus need the 3 firewood.'

Ex Output:
Yes


Ex Input:
Context: 'Your needs are like mine. I have a condition that require  me to shower quite often. It is a shame but if I do not shower for 3 hours I will stink.  ' 'Well fortunately if you are camping that won't be too bad. You'll blend in with the wilderness.' 'My friends will run away. I will not be comfortable either. So how do we split what we have?'
Utterance: 'If they're true friends, they won't. I'll take 2 firewood, 2 water, 3 food.'

Ex Output:
No


Ex Input:
Context: 'What do you need the extra water for?' 'With the extra food I need I will need extra water also.  How about I only take 1 extra water?  ' 'So are you okay with you getting 2 food, 1 water, and 1 firewood and me getting 1 food, 2 water and 2 firewood? I'll do that deal.'
Utterance: 'That should work.  I will conserve with my water and I should be fine.  So we have a deal?  '

Ex Output:

No