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: 'Yes definitely!  I am pretty easy to work with and would like a deal that will help us both out as much as possible.' ' The item I need the most is water because I need to hydrate to stay strong and achieve my goals. And you?' 'I would say water as well because I am very active and build up thirst as a result.  However, I would be willing to compromise on things to allow you to have more water.'
Utterance: 'The item that I need the least is firewood because I will dedicate myself to look it up at the camp. And you?'
[A]: Yes


[Q]: Context: 'Hello. I'm looking forward to striking a deal with you that makes both of us happy!' 'Sure I am waiting too!'
Utterance: 'So tell me, which is most important to you? What can't you live without?'
[A]: Yes


[Q]: Context: 'I'm well! Excited for this camping trip.' 'Same! I'm a little worried about some of my supplies though. What about you?' 'Likewise! What are you most in need of?'
Utterance: 'Well, I'm camping up on a snowy mountain and I gave some of my food away to hikers who were passing me and were very tired and hungry, so I'd really like to get some more food. Firewood would be useful too, although I do have a thick coat and a sleeping bag. I plan on melting the snow to get water, so I don't think I'll need that too much. And you?'
[A]:
Yes