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.

Input: Consider Input: Context: 
Utterance: 'Hi!  The weather is going to be a lot colder than I anticipated, so I need extra firewood.  Would you be willing to give some to me?'

Output: Yes


Input: Consider Input: Context: 'Good how are you' 'I am doing quite good. I enjoy camping. I however did not bring enough food.' 'Ok I'm sure we can work it out because I know I need extra water and firewood. Do you have any ideas on how to divvy up the extra supplies?'
Utterance: 'I would need some firewood as well, as I need it to cook the food. I was thinking maybe you can have all the water and I have all the food.'

Output: Yes


Input: Consider Input: Context: 'How about I take all the water and firewood, you can have all the food.'
Utterance: 'I need water and firewood. I don't need as much food. I need water for my dog and firewood for warmth since I am camping during the winter'


Output: Yes