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.
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Question: Context: 'Hi i'm really excited for camping. I am looking for food and water ' 'Yes, a much needed getaway. Oh my, we need the same provisions! How would you be with receiving two waters, one food package, and two of the firewood?' 'I think I would be able to make that work. What are you looking forward to while camping? '
Utterance: 'Mainly cooking because I love to eat. It will be fun this time because I am leaving the kids at home. I also love swimming if we can find a river or big stream. How about you?'

Answer: Yes


Question: Context: 'So in order to fully enjoy my on this trip while surviving, I will require mass quantities of food.' 'k i need food as first priority' 'Unacceptable'
Utterance: 'why'

Answer: No


Question: Context: 
Utterance: 'What is it that you really need on this camping trip?'

Answer:
Yes