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: 'Ooh rock climbing! I'm definitely scared of heights, so that's out for me. I'm heading to the Puget Sound to camp near the ocean.' 'My wife is from the puget sound. Was just up there a month ago.  I am looking to take the food and water.  We have a large group and will be active.  We will have some hot and dry conditions in the desert. Some are high school age students with big appetites.  What are your preferences.' 'I was definitely looking to have food and firewood most of all. There are plenty of places to collect rainwater and get fresh water in Puget Sound, but we're lacking in food and will need firewood to start a campfire at night.'
Utterance: '😮 I see.  I am wiling to give you the firewood, but I also really need the food.  I could take the waters and two food, and how about if you take the firewood and 1 food? The firewood would be helpful since we need to cook a lot of our food and there is not much to collect in the desert, but if we can take extra food, then it will help solve that problem.🙂'
No

Context: 'i really need water and food. we did not get enough of those.' 'Those are my priorities as well, how about you get all the food and two firewoods, and i get all the water and one firewood, does that sound fair?' 'i would prefer water instead of food if possible, but i am sure we can work it out.'
Utterance: 'water is really important for me, how about i get two waters and three firewoods and you get three foods and one water?'
Yes

Context: 'That sounds like a good deal but I could use some firewood as well. Would you throw one of those in as well?' 'That doesn't seem very fair ☹️. That would be 3 food and 1 firewood for 2 water. That is 4 items exchange for 2.' 'Ok what if I throw in 3 waters in exchange for 3 food and 1 firewood? So it is a 4 - 3 exchange instead.'
Utterance: 'Actually I changed my mind , lets just do 3 food for 3 water?'

No