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.
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Question: 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.🙂'

Answer: No


Question: Context: 'I wish we could split packages in two!  How about if I give you another food and I keep two firewood?' 'that is ok, the original you stated will work, 2 food, 2 water and 1 firewood for you, and 2 firewood, 1 food and 1 water for me , i need to lose weight anyways ' 'Well now that you mention it, I could lose a few pounds 😮'
Utterance: 'haha but you enjoy hiking, i do not. '

Answer: No


Question: Context: 'Sorry, I sent my last message inadvertently. I meant to say that that sounds great! Yes, I can understand the need for extra water for the hike. With the size of my family, I could use a bit of extra food for our trip.' 'We can get by with less food since the girls will be looking to forage in the forest to get a badge.' 'That's awesome! Since we have the basics, would you be willing to swap 3 packages of food for 3 packages of water?'
Utterance: 'We will need two food so we can fill their bellies, but I will be glad to offer you all the firewood since I can use my axe and get wood for us.'

Answer:
Yes