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: 'Ok, would you do 1 firewood, 2 water and 1 food then?' 'Can I get 3 water and 1 firewood instead?' 'so I get 2 firewood, and 3 food? Ok I will agree to that'
Utterance: 'Great! Sounds like a deal! we have enough food for tonight so I think we will be good. '

SOLUTION: No

PROBLEM: Context: 'Since it's hot there, I get thirsty and dry real quick. 😡' 'Oh ok, well I plan on bringing some juice, beer and other drinks. So I could spare some extra water. And I am pretty good at fishing, so I won't need much food either' 'How nice of you. I certain we can work something out. 🙂'
Utterance: 'How about I get 3 firewood 0 water 2 food, and you get 0 firewood 3 water 1 food?'

SOLUTION: No

PROBLEM: Context: 
Utterance: 'Hello, what are your preferences for food, water, and firewood?'

SOLUTION:
Yes