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.

Q: Context: '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.' 'Well I think we can make a good deal then. How many packages of food would you want?' 'Could we each do 3 of what we need the most? I get three food and you get three water? How do you propose splitting up the firewood?'
Utterance: 'We can do the 3 for 3 trade. That works perfectly! Its' going to be cold at night where I'm going. What's it like where you're heading?'

A: Yes
****
Q: Context: 'Hello there, I'm trying to get some more water. I take medication that makes me dehydrated. Is there something you mite be looking for in exchange?' 'I'm sorry to hear about that -- I've been needing water because my child is with me and I can't let them get dehydrated since they're so young. Could we split the other items?'
Utterance: 'We mite can do that. What do you need more of?'

A: Yes
****
Q: Context: 'We could do without the water as well. I'm willing to trade you 3 firewood for 3 food and 2 waters' 'We need some firewood too, though! ☹️ Let's try to make a deal that benefits us both! 🙂 Could I have 1 firewood, 3 food, and 3 waters?' 'I meant I would give you my firewood, what would you trade in return?'
Utterance: 'Oh sorry for the confusion. 😮 In that case, thank you for the generosity! 🙂 How about if I have 3 firewood, 1 food, and 1 water?'

A:
No
****