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.

Context: 'Me too! It will be great to finally get out of town for a few days. I mostly need more firewood to keep the wife nice and toasty. How about you?' 'oh it turns out I need firewood too!🙂' 'Ha what a surprise! ;-) What do you need second most?'
Utterance: 'I need food to feed all my friends that are coming up. how about you?'
Yes

Context: 'I need to keep the fire burning so i need firewood most. What about you?' 'I dont need the firewood as much. ' 'That is great for me. I guess i will take all three.🙂'
Utterance: 'sure what other preferences would you like '
Yes

Context: 'Yes that would be great 🙂🙂' 'Ok, what item do you need the most and which item do you need the least? That information would help me think of an offer that suits both of us.🙂' 'I need   food and water the most . There are 3 of us.🙂'
Utterance: 'Your most needed item is water or food?'

Yes