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 there.. we're looking forward to this camping trip.. hope you are, too! Is there anything in particular you guys need / want out of the extra stockpile we've got?'
Utterance: 'Hello! Which item do you need the most?'

A: Yes
****
Q: Context: 'I need 2 firewood because it gets below freezing at night' 'Oh I wouldn't want for you to freeze☹️ It also gets cold where I am, so I need 2 firewood as well.' 'IF I can't get 2 pieces of firewood, I will walk away'
Utterance: 'oh that is too bad. I feel the same way.😮'

A: No
****
Q: Context: 'hello, I am good, I am very excited about this trip. how are you?' 'i am great, super excited about camping as well, are there any supplies that you really need?' 'i really need water and food. we did not get enough of those.'
Utterance: 'Those are my priorities as well, how about you get all the food and two firewoods, and i get all the water and one firewood, does that sound fair?'

A:
No
****