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: 'yes of course!' 'great!' 'So we have agreed i get 2 foods and 3 waters and you get 1 food and 3 firewood? does that sound good?'
Utterance: 'I thought you just wanted 2 waters?'
No

Context: 'Ok, would you do 1 firewood, 2 water and 1 food then?' 'Can I get 3 water and 1 firewood instead?' 'so I get 2 firewood, and 3 food? Ok I will agree to that'
Utterance: 'Great! Sounds like a deal! we have enough food for tonight so I think we will be good. '
No

Context: 'Hello! Do you have any sort of preference regarding the 3 camping items?'
Utterance: 'Hello there! It's nice to meet you. Truthfully, I need to get some food and some firewood. What do you need?'

Yes