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: 'Hi! How are you?! You excited for your camping trip??! I sure am ready to go on mine!' 'I am very excited, I'm actually going camping in a week. I drink a lot of water so it's important that I bring a lot. What about you?' 'I really am! I have been watching the weather and updates about the area I will be traveling to. They are experiencing a severe drought, so I will be in need of some extra water as well! I planned on staying an extra couple days as well. There is a stream nearby I believe, but I'm not sure how much it has dried up.'
Utterance: 'That's good to hear, you always have to be careful with wild water though, it has all kind of germs. Sounds like you'll have plenty of dry firewood though. '
[A]: No

[Q]: Context: 'Hi, it is nice to be going camping. I do not have a very good sleeping bag and I can get cold at night. It would be nice to have extra firewood. I dont eat much so I do not need much extra food. Would you be willing to give me two packages of firewood for a package of food?' 'I enjoy camping as well. However, my campsite seems to be a bit chilly at night. I'd be willing to part with some firewood, yet I'd need quite a bit of food to compensate. I also have a stream nearby so water is plentiful if you need that as well.' 'I may be able to do something with regards to food. Do you have enough water?'
Utterance: 'I have more water than I need. How is your water supply?'
[A]: Yes

[Q]: Context: 'We wantto do a lot of hiking on our trip and therefore I need extra water to make sure we stay hydrated. '
Utterance: 'hi! thats awesome i am going camping too, but not a lot of hiking. I am bringing 2 teenage boys so food will be very important for us'
[A]:
No