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.

Context: 'Wish it was an easy car ride.  We're miles and miles from a store and it's getting dark.  I don't do well driving in the dark.  I think we might be getting close to agreement.  As I understand it:  you would get 1 water, 2 firewood and 2 food portions?  Is that correct?' 'Actually, I suggested that you would get 1 water, 1 firewood and 1 food portion.  I can compromise with you though.  I would like 2 water portions, 1 firewood and 1 food.' 'Since I arrived with no water at all, I would definitely need at least 2 waters.  I'm afraid I don't have a lot of "wiggle room" with that.  I'm open for the other supplies.  Ideally, I would like to have 2 waters, 1 firewood and 1 food portion.'
Utterance: 'If that's the case, I would like 1 water, 3 firewood and 3 food portions.'
No

Context: 'I was just negotiating the water for now.  I was trying to do one at a time.' 'ah, I'm definitely ok with doing one at a time: A 2:1 split is definitely OK with me: The issue is, if we consider each individually, it might be harder to come to a deal, but I'm happy to do it your way.' 'How about you take 1 firewood, I''l take 2 and with food, you can have 2 and I'll take one package.  I have two very hungry boys!'
Utterance: 'Is there a reason you want the 2:1 split? Food my group's largest priority by a large margin (We eat a lot). It's worth a lot more to my group then the firewood would be.'
Yes

Context: 'Yes, I think that sounds like a good option. I personally could use more food. I like to eat. ' 'how do you propose we split the food then?' 'Well I don't mind either way about the food. I'll recommend giving you 2 firewood 1 food and 1 water. '
Utterance: 'how about you get 3 waters and 2 foods? Does that work better?'

No