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 Q]: Context: 'I'm doing great!  I'm on the first camping trip with my five children.' 'Wow, that's amazing. My parents took me camping when I was young. Now we going hiking every other weekend. What do you plan on doing?' 'That sounds like so much fun!  I hope we get to hike some.  I have my four month old baby with us which is exciting.  I'm worried I didn't bring enough water for his bottles, though.'
Utterance: 'That sucks, you need to be hydrated. What supplies do you require? My family loves to grill, so we do require food.'
[EX A]: Yes

[EX Q]: Context: 'That's amazing!!!  So here is the deal...I'll give you the 2 firewood packages so you can sleep under the stars tonight.  In return I'll have to keep 2 water packages and 2 food packages since I won't be able to cook all of this fish and I still have a family to feed.  ' 'I'm glad you understand my problem. But I really need those 3 firewood packages. I'd be happy to give you 2 water packages and all the food in exchange.' 'Initially you were willing to take the 2 packages of firewood. If you have all three I won't be able to cook any of this fish and it will all go to waste. ☹️'
Utterance: 'Didn't you bring any firewood at all with you?'
[EX A]: No

[EX Q]: Context: 'no what about this, I get 3 firewood then rest is yours' 'I think can highly consider it, why do you prefer the firewood? ' 'for me, firewood is more useful '
Utterance: 'I see. What do things would you use the firewood for?'
[EX A]:
Yes