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: 'Let's talk about what we need. First, I don't eat meat, so I really feel like I'd need a little extra food, as I couldn't hunt or forage for food at all. I feel like I could survive without a ton of water, but would need water, as I hike a lot and cant trust any sources' 'I've also planned my trip to include a lot of hiking and so I have a high priority for extra water, as like you've said you need to stay hydrated on your hike and you can't trust any source. How can we divide up the water as that seems to be the number one priority for us both.' 'That works well, as long as I can have 2 food, I'll certainly give you 2 water, and I will have one water and you'll have one extra food'
Utterance: 'I would be most happy to make a concession on the food for an extra ration of water. Are you going to require any firewood if you don't need any I think i'll take the 3 rations so I can have a nice bonfire.'

Output: Yes


Input: Consider Input: Context: 
Utterance: 'Hi!'

Output: No


Input: Consider Input: Context: 'What are your thoughts on the amount of water you need?' 'I would need 2 out of 3 as well.' 'Interesting - you're essentially saying that you need the majority of two of the three items. Hmm...'
Utterance: 'Yes, thats all. I need 1/3 food, 2/3 water, and 2/3 firewood.'


Output: No