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: 'What about I take 2 of the packages and you take 1? I know teenagers also drink a lot of water haha 🙂' 'He definitely does drink a lot of water, but he's in a growth spurt so 2 would be ideal. I'm happy to give up all firewood in exchange for the extra food!' 'okay that sounds like a better deal then! I will take all the firewood and 1 food, and you can take the 2 food packages'
Utterance: 'Awesome, I appreciate that. How does the water need look on your side?'

A: Yes
****
Q: Context: 'OK, but first tell me why you need extra food' 'I have 10 people in my group' 'I see. I need more water because I came across some people who were lost and they are very dehydrated.'
Utterance: 'I need 2 firewood because it gets below freezing at night'

A: No
****
Q: Context: 'Hi there.  I'm really looking forward to this camping trip!  Hope we can make a deal over these extra supplies.  🙂  I was hoping to do some hiking and swimming away from my campsite, so having some extra fresh water would be really helpful to me.' 'Hello there.  I too am looking forward to this trip.  Definitely need to decompress. '
Utterance: 'Sounds like it'll be great for both of us.  Is there anything extra you need?'

A:
Yes
****