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.

Ex Input:
Context: 
Utterance: 'Hello! I'm so excited for this camping trip. What do you still need as your supplies?'

Ex Output:
Yes


Ex Input:
Context: 
Utterance: 'Hello, I will start out by saying that I would like to have 3 water because I do not have a nearby water source. What is your situation?'

Ex Output:
Yes


Ex Input:
Context: 'i have some spare cans but i am not too worried about it.  its a low prioirty for me ' 'How about your water?  Won't you be going through a lot of water where you are going?' 'i am good on that,  i dont think i will be but its second on my to do list'
Utterance: 'Are you willing to take 1 firewood and 2 waters?  I also don't need the food.'

Ex Output:

No