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: 'Hi!'

Ex Output:
No


Ex Input:
Context: 'hello' 'Hello, what would you like for the packages?'
Utterance: 'we are cold and hungry so we need firewood and food the most, what about you?'

Ex Output:
Yes


Ex Input:
Context: 'Me as well. What item is your greatest priority for your trip?' 'Firewood and my second priority is water.  I'm open to negotiating though.' 'Glad to hear because I really need firewood and food. What do you propose?'
Utterance: 'I can give you 3 packages of food but I really need the additional firewood.'

Ex Output:

No