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: 
Utterance: 'How are you today? Did you have any preferences on the supplies we will be trading?'

A: Yes
****
Q: Context: 'What are you going to use your water for?  And thank you.' 'In case I do no feel like going to other places to get water.  It would be nice to have extra water.' 'I see, and do you have a way to bring the water with you?'
Utterance: 'I'll probably just put the water in one of my bags.'

A: No
****
Q: Context: 'Doing well how are you?' 'Great thank you. I am looking for primarily some firewood and food for my camping trip soon. ' 'I'm going camping too and also need food and wood, mostly food though'
Utterance: 'Okay I understand that! Is there a particular reason that you do not need much water?'

A:
Yes
****