Definition: 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.
Input: Context: 'I can give you 3 firewood, but only 1 food and no water.' 'Good gravy! I will need to cancel the expedition if that's all you have to spare. Can you surely do no better?' 'I do like to have lots of water because I get thirsty on some of my longer hikes. How about I give you 3 firewood, 1 food and 1 water?'
Utterance: 'I see. I can get by without the water, but I need more food. With 2 food, I will probably need to eat my dog, but I will survive. Will you give me 3 firewood, 2 food, and no water?'

Yes