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: 'I am in dire need of firewood myself. I was planning on bringing food that needed to be cooked over flame. 😮' 'Well maybe we can find a way to split it!  This isn't a problem we can't solve.  Are you in need of food too, then?' 'That would be great! I don't need food as much as I am in need of firewood, to be honest.'
Utterance: 'I brought purification tablets so I can make do with rainwater or river water.  How about you?'

Ex Output:
Yes


Ex Input:
Context: 'i'm good thank you, How are you doing today?' 'I am good, let's plan our camping trips. I am diabetes, so water is very important to me. what about you?' 'I need water too'
Utterance: 'what is the next thing you need the most/?'

Ex Output:
Yes


Ex Input:
Context: 'Hello! What camping supplies are you looking for the most?'
Utterance: 'Hello! I would like more packages of food the most. What are you looking for?'

Ex Output:

Yes