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: 'I could do one firewood and all the food?' 'And I would get all the water?' 'How about you get two firewoods and two water, and I take the rest?'
Utterance: 'No I think I need all the water. I'm in the desert and there's absolutely no water supply. '

Ex Output:
Yes


Ex Input:
Context: 'I have not really camped before so I am looking for as many supplies as possible.  What about I get 3 food, 3 firewood, and 1 water. ' 'funnny you but no. so what else will i be left with if i give you those. okay let say i get 2 food, 2 firewood and 1 water.' 'I am really bad at cooking so will probably need an extra good just because I'll ruin one of the 3.  Plus Im bringing 2 dogs they can eat the bad food I make 😮  I dont plan on hiking much so how bought I keep all 3 foods, and you keep all 3 waters and we can split the firewood.  2 for me, 1 for you. Great deal!'
Utterance: 'i too i am bad at cooking and i will spend a longer time in the woods so i will need atleast 2 foods, 2 firewood and 1 water'

Ex Output:
Yes


Ex Input:
Context: 
Utterance: 'Hey, would you like to take more firewood in exchange I'll get more food? Just in case I get lost and would need to ration out my portions. '

Ex Output:

Yes