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: '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.'

Ex Output:
No


Ex Input:
Context: 'Let's talk about what we need. First, I don't eat meat, so I really feel like I'd need a little extra food, as I couldn't hunt or forage for food at all. I feel like I could survive without a ton of water, but would need water, as I hike a lot and cant trust any sources' 'I've also planned my trip to include a lot of hiking and so I have a high priority for extra water, as like you've said you need to stay hydrated on your hike and you can't trust any source. How can we divide up the water as that seems to be the number one priority for us both.' 'That works well, as long as I can have 2 food, I'll certainly give you 2 water, and I will have one water and you'll have one extra food'
Utterance: 'I would be most happy to make a concession on the food for an extra ration of water. Are you going to require any firewood if you don't need any I think i'll take the 3 rations so I can have a nice bonfire.'

Ex Output:
Yes


Ex Input:
Context: 'yeah we got a lot of things planned for them at the campgrounds. they're going to be pretty busy' 'So what is your main focus this trip?' 'one of my kids is on medication so we are going to need to pack a lot of water. so if could spare that it would be appreciated.'
Utterance: 'Well sadly I plan to go hiking a lot so I will need lots of water, but perhaps we can come to a reasonable agreement if I have to shorten my hikes.'

Ex Output:

Yes