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.

Example Input: Context: 'Hello! how are you doing?'
Utterance: 'Hello, I would like to keep the 3 extra packages of firewood an 2 extra packages of water.  You can have all 3 packages of water and 1 package of food.'
Example Output: No

Example Input: Context: 'You must be a comedian.  We will need to come to a compromise because there's no way that's going to happen.  I am like a water buffalo so I'll need at least two waters.  In addition, my family is from the South and will need firewood as well.' 'I can't swim too. I think two waters will help me to survive on this trip and I will need at least two firewood to make fish or other food items for my family. ' 'You don't need this water to swim.  You can take two of the food if you're worried about food.  I will take two water and two firewood since I have a large family to nourish and keep warm.  Your initial suggestion of 3  waters and firewood is laughable.  Please provide a realistic compromise.'
Utterance: 'If I take two waters, 1 firewood, and 2 food supplies, this will help me during the trip. It seems as if you are more skilled than I am on a camping trip. Please consider my request☹️'
Example Output: No

Example Input: Context: 'Hello!  I'm going to be heading out on a big camping trip and will need to take some extra supplies.  Are you going camping as well?'
Utterance: 'I am also going camping! What do you think you're going to need the most of? What are your preferences?'
Example Output:
Yes