TASK DEFINITION: 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.
PROBLEM: Context: 
Utterance: 'Hello, are there any of the three items that you want to be sure you have enough of? 🙂'

SOLUTION: Yes

PROBLEM: Context: 'Hello, I hope you are having a good day! I would like to know what packages you need the most.' '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?' 'Glad to hear it! I am really looking to get extra firewood, so I would like to make a compromise. If I gave you all the food, could I have more firewood?'
Utterance: 'I like watching the camp fire all night. What is your reason for needing more firewood?'

SOLUTION: Yes

PROBLEM: Context: 
Utterance: 'Hi  - nice to meet you!  I hope we can work out a deal that is good for both of us.'

SOLUTION:
No