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: 
Utterance: 'Hello fellow camper! I am interested to know your preference in items?'
[A]: Yes


[Q]: Context: 'I don't think the weather is going to be that hot, and I don't plan on doing any hiking.  So, I should need much extra water.' 'Cool! I think I've got a pretty good proposal for you for our supplies. Is it okay with you if I send a possible deal we might be able to make for what we have available for our trip? 🙂' 'Go ahead🙂'
Utterance: 'I would like to do some hiking before getting back to the campfire. I especially like hiking when the weather is cooler. It works up my appetite for those hot dogs and marshmallows, which are one of the best parts of camping for sure! 🙂'
[A]: No


[Q]: Context: 'Hey there!'
Utterance: 'Hi! What are your preferences? '
[A]:
Yes