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: 'Hi there.. we're looking forward to this camping trip.. hope you are, too!  Is there anything in particular you guys need / want out of the extra stockpile we've got?' 'Hello! Which item do you need the most?'
Utterance: 'Well we actually really NEED all three items.. but I know you might, too - so I want to make a deal that's fair for you.. is there anything in particular your family needs for the trip?'
[EX A]: Yes

[EX Q]: Context: 'I'll give you another water and food' 'I think we have a deal.  To confirm, YOU get 1 firewood, 2 food, and 1 water?  If yes, please confirm.  I think this sounds fair.' 'Yep, it's correct'
Utterance: 'Ok.  I will submit the final offer.  I appreciate your offer. '
[EX A]: No

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