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: 'Hi  - nice to meet you!  I hope we can work out a deal that is good for both of us.'
Utterance: 'Hi, 🙂 It's nice to meet you as well: I also hope we can work something out: Food is my excess trip priority, What is yours?'

Output: Yes


Input: Consider Input: Context: 'Yes, how about you! We are headed to Joshua Tree NP to do some rock climbing and hiking. ' 'Ooh rock climbing! I'm definitely scared of heights, so that's out for me. I'm heading to the Puget Sound to camp near the ocean.' 'My wife is from the puget sound. Was just up there a month ago.  I am looking to take the food and water.  We have a large group and will be active.  We will have some hot and dry conditions in the desert. Some are high school age students with big appetites.  What are your preferences.'
Utterance: 'I was definitely looking to have food and firewood most of all. There are plenty of places to collect rainwater and get fresh water in Puget Sound, but we're lacking in food and will need firewood to start a campfire at night.'

Output: No


Input: Consider Input: Context: 'Hi.  I am looking at possibly taking 3 of the food packages, 2 of the water packages and one of the firewood.  ' 'Hi. Why do you need so many food packages?' 'Well, I have two teenage boys who will be with me.  In normal circumstances they go through a lot of food.  While camping, hiking and kayaking I know we will need plenty to keep their energy level high to do everything.🙂'
Utterance: 'Well I will definitely need 2 packages of food and 2 of firewood for survival.'


Output: No