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: 'Can I get 3 water and 1 firewood instead?' 'so I get 2 firewood, and 3 food? Ok I will agree to that' 'Great! Sounds like a deal! we have enough food for tonight so I think we will be good. '
Utterance: 'awesome! enjoy your trip'
No

Context: 'i understand friend. i need 2 pack of water and 3 pack of food and 2 pack of fire wood. can you please help me ' 'No way can you have everything, I will need 3 packs of firewood 2 backs of water then you can have all the food' 'i have sicked people and kids so i must need food water fire wood. please help me friend'
Utterance: 'I am sick and have a large family if we cant cooperate together we all get nothing'
Yes

Context: 'True. Turns out i'm dealing with similar situation, we didn't expect weather to be as cold, so extra wood is on my mind as well. Everyone might need to go to bed earlier and cook food that cooks short time since we low on wood !' 'Yes, that's very true. I would be willing to give up water for more firewood.' 'I like that. I could help you out. I'd be interested in giving you some extra food for extra water. We like to go far from campsite to hike and get up to high elevation, so i need to pack extra water just in case. We go during day, when it's warmest and need extra food in case we come back at nigh time or get lost! Not ideal. '
Utterance: 'You can never be too prepared. We stay closer to camp as we have little ones with us on this trip.'

No