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: 'im so sorrry unfortunately i am in dire need of two wood we are in a very cold climate' 'how about i get 1 water, 2 food, and 2 firewood since I'll be here so long? because of my leg i likely won't be able to leave anytime soon' 'What about I give you more food in exchange for you giving me more water? I could give you 2 food and you give me an extra water?'
Utterance: 'unfortunately that doesnt work for me. i am afraid i will not be able to discuss this any further my final offer is i get 2water 2food and 1wood'

Answer: No


Question: Context: 
Utterance: 'Hello 🙂 What do you need most??'

Answer: Yes


Question: Context: 'The most important is water because I have kidney problem so i need some more water.Without water I can't live.' 'I understand that completely. Would you be willing to take 2 waters, and I take 1 water? I still do need some water for my family. I can't have anyone getting heat stroke. But you can have more.' 'Okay.But I need whole water to survive.'
Utterance: 'Of course. So, what about food? I will definitely need the food. I have a big family, and we all need to eat. I can't have people starving. Can I take all of the food?'

Answer:
Yes