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.

Q: Context: 
Utterance: 'Hello fellow camper! I am interested to know your preference in items?'

A: Yes
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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.' '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.'
Utterance: 'I can give you 2 water, but I have to have 1 to help me when I am cooking.'

A: No
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Q: Context: 'I know how that goes...We are planning on hiking too and we could also use some extra food.' 'well I am sure between you and me we will find a way....' 'I really need some food, but I could also use extra firewood. It is supposed to be pretty cold at night and we would love to cook up some smores.'
Utterance: 'I hear you we have the same issues well you can have either 2 food or 2 firewood what would you prefer?'

A:
No
****