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: 'I think if you let me have 2 waters I might survive this scourge!' 'I think that your reasons are very compelling.  I would also like to survive.' 'Oh, I want you too as well😮'
Utterance: 'Thank you partner!'
No

Context: 'Okay so I'm planning this super cool backpacking expedition up the waterfall but I'm going to need all the additional water and food for everyone.' 'All of the additional water and food? That doesn't seem very fair. ☹️' 'Well I'll be splitting it with everyone on the trip as we go up. The people that choose to stay will still get all their basic supplies of food and water. The backpacking trip is going to take three days though, we're gonna need the resources😮'
Utterance: 'I see. Which resource do you desire most?'
Yes

Context: 'We need a moderate amount of everything and I think we can work something out successfully.' 'got it, OK I'll start then. I'd like at least 2 firewood' 'Okay. we brought some of our own food so I don't need much of that either.'
Utterance: 'do you want more water then? perhaps 2?'

Yes