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: 'Hello! I'm so excited for this camping trip. What do you still need as your supplies?'
[A]: Yes


[Q]: Context: 'Hello, I was hoping we can chat. '
Utterance: 'Hi there. '
[A]: No


[Q]: Context: 'That sounds great! What do you prefer with the additional packages for camping?' 'Yes I do! I was to ask you that in this conversation, will you be Okay with any agreement?' 'Let's see what we are both thinking and negotiate from there. What are your first thoughts on the additional camping packages?'
Utterance: 'I need all the food packing and some basic needs for the camping, may I know about your first though on which you need additional package?'
[A]:
Yes