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! I was hoping to get 2 packages of firewood, 2 packages of water and 1 package of food and you can have the rest.' 'Hello. Is there a reason you prefer more water and firewood to food?'
Utterance: 'I get cold very easily and also get thirsty a lot. What are your preferences?'
Example Output: Yes

Example Input: Context: 'Great, we can split the food, how are you on water?' 'That would be great. I need to have frequent small meals throughout the day so the extra food would help. I have plenty of water. ' 'alright, so I'll keep the water, and firewood, and give you 2 extra food. Does that sound like a good deal?'
Utterance: 'I actually need one firewood and one food package. I can give you one water. '
Example Output: Yes

Example Input: Context: 'My favorite thing to do around the campfire is to sing songs. I also like to do extra hiking as well. I especially need firewood. ' 'Well, I could see fit to give you the extra firewood (If I can hear a few of your songs!) if you don't mind letting me take the water.' 'Hahaha, once you hear my singing you might hope the opposite. I can do that with the firewood and water, but I really would prefer two of the remaining foods. '
Utterance: 'I could also use the extra food, so can we resolve it amicably? Coin flip maybe?'
Example Output:
No