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: 
Utterance: 'Hi, I'm hoping we can come to a nice deal. 🙂 I'm most interested in firewood, because it always helps to have extra if your fire goes out.'
Yes

Context: 'I will offer 3 water to you! You will maybe need more food with that much exercise? How about 2 food? I really need that extra firewood. Remember that the Catskills probably has some extra wood around.' 'That works for me, you can have the firewood then!' 'Alright that sounds great. '
Utterance: 'Great! so, for you, 2 wood, 1 food, me 3 water 2 food'
No

Context: 'hi! i would love to take my kids camping to teach them about the outdoors, to do this how about i take all of the food and 2 of the waters, you can have the rest ' 'Hello there.  That deal most definitely will not work for me. ' 'OK, If i take all 3 of the foods and 1 of the waters you can have the remaining packages '
Utterance: 'I need to eat too, especially if I want to go on a long hike.  How about I take 2 foods, 2 waters, and 1 firewood? '

Yes

