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: 'I prefer to have the most water as I have a medical condition that requires me to stay extremely hydrated at all times. If I get too dehydrated, it's extremely bad for me. How about I get 3 water and 1 food, and 2 firewood?' 'I'll give you the 3 water, 1 firewood. How about I get 3 food and 2 firewood? I'll need the fire to cook my food.' 'I would need firewood to cook my food as well. I would like the 3 water, 1 food, and 1 firewood, what about that? '
Utterance: 'Since the value of water exceeds both food & firewood, I think it's fair for me to receive the extra dose of firewood. My offer to you is: you get 3 water, 1 food,  0 firewood.  I would get 0 water, 2 food, 3 firewood.'

Ex Output:
Yes


Ex Input:
Context: 'Hi I would like to trade you food for some water 🙂' 'How many food would you like to trade for water?'
Utterance: 'How about 2 Water for 3 food?'

Ex Output:
No


Ex Input:
Context: 'Hi! How are you?' 'I am fine. How is your camping trip going?' 'I'm just finishing the final details of packing. I'm a little concerned I don't have enough of a few things. It is supposed to be over 100 degrees where we are going, and I don't think I have enough water. I'm concerned my kids are going to get dehydrated. I really could use 3 extra packages. '
Utterance: 'That will not be possible i am afraid. I need at least 2 packages of water too. I have some tabs that i have to take with water regularly.'

Ex Output:

Yes