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: 'Mine is firewood with second being food.' 'I'm definitely willing to give up some food for some firewood: That seems like a place where we can come to an arrangement: Would you like to make an opening offer? ' 'Sure!  I figure I can go with little water as we can get it from the stream and boil it.  So for water I would be willing to give you 2 packages.  Would that be fair?'
Utterance: 'so If I understand correctly, the Deal is I get 3 Food and 2 Water: While you get 3 Firewood and 1 Water?'

A: No
****
Q: Context: 'Hello.  What are your preferences for extra items for your camping trip?' 'hello'
Utterance: 'Do you have a preference for any extra items for your camping trip?'

A: Yes
****
Q: Context: 'I'm doing well. I'm trying to prepare for this camping trip. ' 'Me too.🙂' 'What are you looking for?'
Utterance: 'Firewood. I need 3. What do you need?'

A:
Yes
****