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.

Example Input: Context: 'Hi, I would like all of the water and 2 food packages. You can have all of the firewood and one food package. Does that sound good?' 'Nice to meet you! I definitely like the idea of having all of the firewood, but water is very important to me. Let's see if we can come to and agreement on how to split up the water.' 'I typically drink a lot of water every day. So I can't agree with much less on that!'
Utterance: 'Alright, I'm sure we can something that works for both of us. The location I'm camping in is only accessible by foot, so I anticipate that I'll need a little more water than normal to feel completely safe. Is there any water source nearby your campsite?'
Example Output: Yes

Example Input: Context: 
Utterance: 'Hello '
Example Output: No

Example Input: Context: 'Hi, I will need alot of water as I need it to stay alive.'
Utterance: 'I agree, with camping i feel there are many uncertainties. Finding clean water would be too difficult, best to take as much water as possible. '
Example Output:
Yes