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.

Input: Consider Input: Context: 'I'm doing great!  I'm on the first camping trip with my five children.' 'Wow, that's amazing. My parents took me camping when I was young. Now we going hiking every other weekend. What do you plan on doing?' 'That sounds like so much fun!  I hope we get to hike some.  I have my four month old baby with us which is exciting.  I'm worried I didn't bring enough water for his bottles, though.'
Utterance: 'That sucks, you need to be hydrated. What supplies do you require? My family loves to grill, so we do require food.'

Output: Yes


Input: Consider Input: Context: 'Howdy! Looking for firewood, water and food--really trying to get 3 packages of each, want to make sure my family has enough supplies for camping. I don't want anyone injured or our vacation cut short.' 'Ok.  I am looking to have one package of water and on package of food.'
Utterance: 'Is there any way you could let us have 3 packages of each? I'm just trying to make sure my family has enough, we don't get to get out in the woods that often. It's really important to us.'

Output: No


Input: Consider Input: Context: 
Utterance: 'Hello, great to see a fellow camper.  Planing on doing any hikes.  My family and mother-in-law are down getting some new trail maps.  We are looking forward to the long camping weekend.  Our bad luck was the airline loss two of our bags that had our food and water.  So i am hoping to get some more.🙂'


Output: No