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: Consider Input: Context: 'Im a vegitarian so food I would like 1 food and for fire 2' 'I think that we can work it out 🙂. We could do something like 2 firewood for you, 1 for me. 2 water for me, 1 for you. And 1 or 2 foods for you, 1 or 2 foods for me. What do you think?' 'That is a kind offer. 🙂 The water is very vital for me. How bout 3 water for me, 0 food for me 3 for you and 1 firewood for me and 2 for you '
Utterance: 'Zero water is not going to work 😮. I am willing to switch water and firewood amounts so that I get 2 firewood and 1 water and you get 2 water and 1 firewood. '

Output: Yes


Input: Consider Input: Context: 'Hello there?' 'Hi! How are you?'
Utterance: 'I am fine. How is your camping trip going?'

Output: No


Input: Consider Input: Context: 'Well I didn''t bring any with me so I really need two.  I am willing to give you 2 waters.🙂' 'I also need the water, because it's not safe to drink from streams here.  ' 'You are right, my water is dirty also but I am willing to let you have all three water. I would rather eat, so I would like 2 food.'
Utterance: 'Well, if I have to catch fish to eat, I'll need the firewood to cook them.'


Output: Yes