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: 'Hi there! Are you excited about camping?' 'Hey! I sure am! The only thing is, I just learned that the canyon where I'm camping is going to be experiencing an unexpected heat wave over the next few days and I'm worried I might not be fully prepared. ☹️ What about you?' 'Same here! Last time my daughter got dehydrated and it made her sick!'
Utterance: 'That sounds awful! 😮 Where are you going to be camping?'

Ex Output:
No


Ex Input:
Context: 
Utterance: 'Hi, How are you?'

Ex Output:
No


Ex Input:
Context: 'I would like all the firewood and two packages of water. You can have the rest.🙂' 'I want all of the water, two firewood, and one food.' 'Why do you need all the water and little food?'
Utterance: 'I need to stay hydrated because the weather is hot. I am trying to lose weight so I do not need much food.'

Ex Output:

Yes