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, I hope you are having a good day! I would like to know what packages you need the most.'
Utterance: 'Hello, I'm having a wonderful day.🙂 Thanks for asking. I hope yours is a wonderful day as well. I would like 2 firewood, 2 water, and 1 food. How about you?'
Example Output: Yes

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: 'Hi, what is your highest priority item?'
Utterance: 'I would love to have extra food for my trip, bringing the family! how about you?'
Example Output:
Yes