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.

Ex Input:
Context: 'Ugh ☹️ I too could really use the firewood. We need that campfire going all night to be able to socialize. How about water? Do you have enough? Do you need more?' 'I have an idea. I could give you 3 firewood and you give me 3 water and 3 food. ' 'That would be great but I could find myself in need of some extra water. Don't want t get dehydrated from all the dancing! Could I trade you one of the firewood for 2 of the water?'
Utterance: 'I see. How about you get 2 firewood 1 water 1 food. And I get 1 firewod 2 water 2 food?'

Ex Output:
No


Ex Input:
Context: 'Firewood, due to the area that we are going to. How about you? ' 'Oh I see. You can have all 3 firewood if you are ok with me taking all 3 food.' 'Hmm, well I'd love to get some of the food. What I took 2 firewood, 1 food and 1 water? '
Utterance: 'Sorry but I really need all 3 food. All the food I brought with me has spoiled because the AC in my car broke. ☹️'

Ex Output:
Yes


Ex Input:
Context: 
Utterance: 'Hello, the trip sounds like it will be a lot of fun.  What is the most important essential package for you and your family?  I know we didnt bring a lot of food so I am looking for more of that than anything else.'

Ex Output:

Yes