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.

Context: 'I would be interested in firewood. Can I ask you, what are your primary concerns on this trip?' 'My primary concerns are staying hydrated, I have been feeling sick and throwing up from being so high up in the mountains. ' 'Oh, so sorry to hear that. I can understand why water would be important to you. I am worried about being too cold at night. My sleeping bag is not rated well for cold weather (I packed the wring one).'
Utterance: 'Oh I understand that for sure. I am not used to the cold weather either which is not helping. Would you be interested in a trade for water in exchange for firewood? '
Yes

Context: 'I really need water because I take medication that requires drinking a lot of water. The firewood I dont need to much off and I need very little food as I am dieting. lol 🙂' 'I totally understand that. And it's pretty important, lol ' 'It sure is..So how much food do you need for the trip? Do you need firewood to cook the food? Thank you for understanding my issues. 🙂'
Utterance: 'I definitely need the food the most. I'm definitely not a "hunter", so if I were to run out, I'd be in pretty sad shape. I do need the firewood for both cooking, and keeping warm. It gets cold at night where we're going. How about youself?'
Yes

Context: 'Yes, I expect that! You need food most and I need water, so let's propose an exact trade? 3 for 3?' 'My main objective for the camp is food and firewood, since I have a large family and the amount of food they give in the camp is very small for all my family and my wife and I have to cook with firewood in the camp.' 'I understand completely. I would like to have all three water, and I'm only traveling with just me, so how about 1 firewood? The rest for you.'
Utterance: 'No me gusta mucho el trato, pero para eso debemos hablar y decidir como adultos un buen trato para los dos. Lo que queremos es disfrutar en el campamento.'
No