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: '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.' '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. '
Utterance: 'Yes, I would be willing to let you have all the firewood for 2 of the cases of water.  How much food were you needing?'

A: Yes
****
Q: Context: 'I am fine with you having the 3 foods. Is it okay if I have 3 water units We are fasting and need lots of hydration.' 'Are you sure you need all of the water? It would be nice to have some extra.' 'Well, we do need the water pretty badly. But I guess wanting all the water is stingy so I will pack extra water since we are not packing food. How about you guys receive 1 water and 3 food units?'
Utterance: 'If you feel you absolutely need the 3 waters, I will let you have them provided I can have 2 firewoods along with the 3 foods.'

A: No
****
Q: Context: 'I will submit a deal that might benefit us both.  ' 'We can work on that together'
Utterance: 'What is on your most needed item?'

A:
Yes
****
