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.

Example Input: Context: 'Hi friend! I'm very excited to go to the trip' 'Great! Have you checked to see what the weather has been like in the area you are going to??' 'Definitely I will checked. I m eager to prepare each & every things for the trip'
Utterance: 'I have checked and see that it is in the rainy season! I know I need to pack some extra firewood if you can spare me some??'
Example Output: Yes

Example Input: Context: 'Hello, I would really like to get most of the water and firewood packages.'
Utterance: 'You can have most of the water and firewood if I can have most of the food. I would like to get two of the firewood so I have a nice fire to come back to after searching for a source of water.'
Example Output: Yes

Example Input: Context: 'Water, what about you? ' 'Food, but I definitely do need some water, too. Can you live with taking 2 waters?' 'Yes, can you live with two foods? '
Utterance: 'I can. How about firewood? I would like 2 if possible.'
Example Output:
No