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.

[Q]: Context: 'No it's not.  Since my fever is very high and my chills are very bad I'd appreciate you letting me have 2 firewoods and in exchange you could have all the extra food.' 'That is an interesting proposition.  What about the water?' 'I think if you let me have 2 waters I might survive this scourge!'
Utterance: 'I think that your reasons are very compelling.  I would also like to survive.'
[A]: Yes


[Q]: 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. ☹️'
[A]: Yes


[Q]: Context: 'Food of course, always snack more when relaxing.  Agree on the hiking.  Out in the woods, we won't have to wear masks!' 'Well we don't want to make all the bears sick though haha. Okay so let's try this... one of us gets 2 waters with 1 firewood and 1 food. I think that's as close as we'll get to equal. You can choose.' 'awe, that's true,  Now I fell bad for the bears.  I'll take 2 waters and 1 food, you can have all the firewood.'
Utterance: 'Okay that sounds great. Have fun!'
[A]:
No