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 elicit-pref strategy, otherwise output No. elicit-pref is a cooperative negotiation strategy. It is used to discover the preference order of the opponent in the negotiation.

Ex Input:
Context: 'Yes i can understand.' 'We will be in an area where there is not much firewood to collect. You have to bring it in.  We hope to cook with it and keep warm in the evenings.  I am hoping to take at least 2 firewood packages.' 'I will give you water. Firewood also need for me because of my health condition i want some warm.'
Utterance: 'Will one extra firewood be enough to keep you warm?'

Ex Output:
No


Ex Input:
Context: 'Hi there.  I'm really looking forward to this camping trip!  Hope we can make a deal over these extra supplies.  🙂  I was hoping to do some hiking and swimming away from my campsite, so having some extra fresh water would be really helpful to me.' 'Hello there.  I too am looking forward to this trip.  Definitely need to decompress. '
Utterance: 'Sounds like it'll be great for both of us.  Is there anything extra you need?'

Ex Output:
Yes


Ex Input:
Context: 'You must be a comedian.  We will need to come to a compromise because there's no way that's going to happen.  I am like a water buffalo so I'll need at least two waters.  In addition, my family is from the South and will need firewood as well.' 'I can't swim too. I think two waters will help me to survive on this trip and I will need at least two firewood to make fish or other food items for my family. ' 'You don't need this water to swim.  You can take two of the food if you're worried about food.  I will take two water and two firewood since I have a large family to nourish and keep warm.  Your initial suggestion of 3  waters and firewood is laughable.  Please provide a realistic compromise.'
Utterance: 'If I take two waters, 1 firewood, and 2 food supplies, this will help me during the trip. It seems as if you are more skilled than I am on a camping trip. Please consider my request☹️'

Ex Output:

No