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: 'Hello there! I look forward to striking up a deal that's good for both of us. 🙂' 'hello, me too. what is most valued to you?'
Utterance: 'I just want to make sure that I get a lot of firewood. It's going to be freezing cold on my trip, and I need to make sure I can stay warm. What's most valued to you?'
Yes

Context: 'I am a big eater. I tend to eat a lot throughout the day. You? 🙂' 'Ha I get that! I'll need that too, but mostly water because my family wants to do a lot of hikes.' 'Thirty I see. No problem, we'll work something out. 🙂'
Utterance: 'Do you plan on having lots of campfires?'
Yes

Context: 'I am also going camping! What do you think you're going to need the most of? What are your preferences?' 'It's going to be hot during the day where I'm going so I'll need some extra hydration. So water is my main priority.' 'Got it! I am going to need the most of food. There aren't any animals or berries that I feel safe eating where I'm going.'
Utterance: 'Well I think we can make a good deal then. How many packages of food would you want?'
No