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.

Context: 
Utterance: 'Hi there. Hope you too are looking forward to this much needed camping trip. What are your needs in terms of extra packages?'
Yes

Context: '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.' 'I can give you 2 water, but I have to have 1 to help me when I am cooking.'
Utterance: 'What about the food? How much food do you need for camping?'
Yes

Context: 'Hello there.  I am excited about this camping trip!' 'I'm also excited, I love the outdoors!' 'My favorite thing to do is sing songs and tell stories around a campfire.  Consequently, I was really hoping to get some additional packages of firewood. 🙂'
Utterance: 'I do love sing alongs around the campfire. I usually go hiking and it requires a lot of energy and fuel. Maybe I can get additional food packages?'

No