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: 'What is it that you really need on this camping trip?'
Utterance: 'I really need some more food. I only have the basics, and I'm afraid it's not going to be enough. What about yourself?'
[EX A]: Yes

[EX Q]: Context: 'Hello! I am looking forward to the camping trip but could use a few more supplies!' 'hello, me too, i guess we can share'
Utterance: 'Sounds good, I need food the most, what is your most needed item?'
[EX A]: Yes

[EX Q]: Context: 'I want to make sure I'm well prepared for camping. How would you feel if I took 2 water, 1 firewood, and 2 food?' 'I really need 3 firewood because I am always cold.'
Utterance: 'If I gave you 3 firewood, would you give me 3 water? I can do without the wood, but the water is really important to stay hydrated.'
[EX A]:
No