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: 'I need to keep the fire burning so i need firewood most. What about you?' 'I dont need the firewood as much. ' 'That is great for me. I guess i will take all three.🙂'
Utterance: 'sure what other preferences would you like '

Ex Output:
Yes


Ex Input:
Context: 'Oh, so sorry to hear that.  I can understand why water would be important to you.  I am worried about being too cold at night. My sleeping bag is not rated well for cold weather (I packed the wring one).' 'Oh I understand that for sure. I am not used to the cold weather either which is not helping. Would you be interested in a trade for water in exchange for firewood? ' 'Well, I am worried about staying hydrated as well.'
Utterance: 'Do you have food? I have been trying to hunt but have not really found any animals nearby to hunt.'

Ex Output:
Yes


Ex Input:
Context: 'Hi there.  Hoping it'll be good, and yours as well.  I was hoping we could negotiate so I could get this extra water - I was planning on this being a hiking trip and it's pretty warm and humid out, so I imagine I'll need it.' 'I don't have any problems letting you have all 3 waters. Would you be willing to give me all 3 firewood? I need extra to keep me warm as I get cold easily.' 'That's a little tough for me but if we can come to an agreement where I get 2 of the food, I'd be willing to play ball.  We both deserve a good camping trip, after all.'
Utterance: 'That's true. We both deserve a good trip. Why do you need more food?'

Ex Output:

Yes