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: 'Hello! I would like make a deal with you on firewood, water and food! Are you interested in any items ?' 'Yes, I'd definitely be interested. How are you doing?' 'Not bad, not bad. How are you. What's on your mind for camping? '
Utterance: 'I'm doing well. We're desperately needing wood. We didn't realize how cold it would be as it is our first time here. There is none around our area so we are really concerned about staying warm especially at night. We also forgot a bag of food, so that's another need for us.'

Ex Output:
Yes


Ex Input:
Context: 
Utterance: 'Hello, I am very cold and need food and wood to remain warm. How about I get 3 firewood, 3 food and 1 water?'

Ex Output:
Yes


Ex Input:
Context: 'the temperature is 115 degrees F where I go,  If I don't have extra water I will not make it' 'That sounds awful 😮. Would you settle for you taking two of the water packages and leaving me one?' 'I guess if I can have 2 food and you can have 2 firewood'
Utterance: 'Some of my firewood is wet (and basically useless unless it dries in time). So how about 3 firewood and 1 water for me and you can have the rest. '

Ex Output:

Yes