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: 
Utterance: 'Hi, I'm hoping we can come to a nice deal. 🙂 I'm most interested in firewood, because it always helps to have extra if your fire goes out.'
Example Output: Yes

Example Input: Context: 'Hi, I would like to get 2 additional packages of food, 2 additional jugs of water, and 1 additional bundle of firewood. I need the additional food because I will have 3 children with me on the trip and one of those being a baby. The baby needs water for her bottles and I need an additional bundle of firewood to warm her bottles.'
Utterance: 'Hi, I appreciate your response. I would like to compromise. I will give you the bundle of firewood you requested as well as the 2 packages of food. However, I would like to get 2 jugs of water. I have 2 other adults with me on this trip and they require more water to stay hydrated than a baby would.'
Example Output: No

Example Input: Context: 'Thats great. Do you have any extra firewood you could trade by any chance?' 'Sure, I want to make sure I have one firewood at a minimum. ' 'What would you want in return?'
Utterance: 'I like to eat.  I think extra food is good.  Are you willing to let me have all three food packs? 🙂'
Example Output:
Yes