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.

[Q]: Context: 'Hello, the trip sounds like it will be a lot of fun.  What is the most important essential package for you and your family?  I know we didnt bring a lot of food so I am looking for more of that than anything else.' 'Yes! Hope for lot of fun. Is there any special deal can you offer for maximum order.'
Utterance: 'What item are you looking for the most of?  '
[A]: Yes


[Q]: Context: 'Water is important!! To me firewood is more important as I have anemia and I'm ALWAYS cold lol' 'Alright. I have a  feeling we will have a deal then. How about you give me two water for a firewood?' 'that sounds like a plan'
Utterance: 'how many firewood you need? Maybe we could also exchange one food for one more firewood?'
[A]: Yes


[Q]: Context: 'Hello, I will start out by saying that I would like to have 3 water because I do not have a nearby water source. What is your situation?' 'Hello. I have a health issue that I need to stay hydrated at all times. I do understand your situation though. '
Utterance: 'How much firewood and food do you think you need? '
[A]:
Yes