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: 'hy thats my offer' 'Hi there.. I'm sorry, I didn't see your offer as it doesn't show it for 10 messages, I believe.  So, here's the situation.. I think I can get by with less firewood as I'm a Floridian and prefer it cooler anyway.. also the food is not a huge thing for me as we can catch / improvise around the campsite - but I'm definitely interested in as much water as possible.. both for cooking and cleaning purposes, as well as drinking, of course.  🙂' 'okay so what do you suggest'
Utterance: 'Well, I recognize you're gonna need water too.. so I'd love to take 2 of them, giving you one and I'm totally ok with going 1 on the firewood and one on the food.. that way we all ensure we have enough.. you're making out a bit better in quantity that way but I think its best for both of us 🙂'

A: No
****
Q: Context: 'Hello how are you today? 🙂' 'Fine.'
Utterance: 'You aren't very talkative are you? What preferences do you have for packages?😮😮😮'

A: Yes
****
Q: Context: 'I don't think the weather is going to be that hot, and I don't plan on doing any hiking.  So, I should need much extra water.' 'Cool! I think I've got a pretty good proposal for you for our supplies. Is it okay with you if I send a possible deal we might be able to make for what we have available for our trip? 🙂' 'Go ahead🙂'
Utterance: 'I would like to do some hiking before getting back to the campfire. I especially like hiking when the weather is cooler. It works up my appetite for those hot dogs and marshmallows, which are one of the best parts of camping for sure! 🙂'

A:
No
****