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 need all three of the firewood and three water.  You can have all the food.'
Utterance: '😮 May I ask why? I do need food, but I need some firewood as well.'
[EX A]: Yes

[EX Q]: Context: 
Utterance: 'Hi there! I was looking for 3 extra packages of food and 3 packages of firewood.'
[EX A]: No

[EX Q]: Context: 'I'm good, how are you doing today?' '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?'
Utterance: '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.'
[EX A]:
No