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 would like to trade you food for some water 🙂'
Example Output: No

Example Input: Context: 'Hi!  I want some additional packages of firewood, water, and food' 'Are you bringing guest?'
Utterance: 'I am a campaign partner'
Example Output: No

Example Input: Context: 'Hi, I'd like to take all of the food and 2 of fire wood. You can have the rest.' 'I really need food too so if I can have 2 packages of food you can have 1 package of firewood and all 3 of the water.' '😮That does not work for me. May I have 3 packages of food and one package of water. You can have the rest.'
Utterance: 'Sorry, but I definitely can't accept not having any food. I'll take 1 package of food, and all of the firewood and then you can have the water.'
Example Output:
Yes