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: 'Hi! What sort of packages are you looking for today?' 'Hi there! I am looking to have 3 packages of firewood, 2 packages of food, and 1 package of water please. ' 'Oh we have similar priorities 🙂I am also interested in getting firewood, because I have a condition that makes me very cold, colder than the average person, so I need to make sure I have enough for the trip. Why do you want food'
Utterance: 'That make sense. I need firewood though too because I have an autoimmune disease. When it flares up - when it gets too cold - I get very sick and have to go to the hospital. I need to make sure I have enough for the trip as well. I need food to keep my metabolism up so I can make sure my disease stays in check. Why do you want food?'
Yes

Context: 'That sucks, you need to be hydrated. What supplies do you require? My family loves to grill, so we do require food.' 'Grilling is so much fun!  We left our grill at home so we can't really do that.  I will trade you some food for some water if you would like?' 'sure that sounds fair'
Utterance: 'Ok, do you have any interest in any fire wood?'
Yes

Context: 'Doing great!  How about yourself?' 'Pretty good, Monday's are always bit of a struggle though! ' 'Tell me about it!  With this pandemic it seems like all days are Mondays 🙂'
Utterance: 'Too true! Anyways, what is the item that you prefer the most for this camping adventure? 🙂'

Yes