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: 'Hey there!' 'Hi! What are your preferences? '
Utterance: 'Food is of the highest preference for me! I am a diabetic and always need to be able to eat if I'm experiencing a low! How about you?'
[EX A]: Yes

[EX Q]: Context: 'What are you going to use your water for?  And thank you.' 'In case I do no feel like going to other places to get water.  It would be nice to have extra water.' 'I see, and do you have a way to bring the water with you?'
Utterance: 'I'll probably just put the water in one of my bags.'
[EX A]: No

[EX Q]: Context: 'Not really! I will need you to give me 3 food, 2 water and 2 firewood.' 'Yea, that's not going to work for me. That would leave me with NO food, and only 1 water, and 1 firewood. Would you take that deal, if I offered it back to you?' 'Ok what will work for you?'
Utterance: 'I really need at least some of everything. What do you need the most?'
[EX A]:
Yes