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: 'Okay that would be fine. If I can have 3 packages of firewood, you can have 2 packages of food. Does that work?' 'That does not work for me. I need at least one package of firewood. I'm sure you understand, because it seems like we have medical conditions with similar effects. You can take all of the water if I can get 2 packages of food and 1 of firewood. Does that work?' 'I do understand. That will work for me. '
Utterance: 'Could you tell me about why you want water? '

SOLUTION: Yes

PROBLEM: Context: 'HI, I will have all of the packages of food and 2 waters and 2 firewood and you can have the rest. Unless none is needed for you then I will take them all.' 'i will need 3 firewood packets. I have a terrible disease that prevents my circulation from working properly.' 'That does sound bad. I am going camping and my kids might want to stay up late so I will need extra firewood for this to keep light and more warmth. I will take all 3 extra of the food and the water but I need 2 firewood also.'
Utterance: 'no that won't work. I will give you 3 food and 1 water. I will take 3 wood and 2 waters.'

SOLUTION: No

PROBLEM: Context: 'Hi! I'm really hoping to get a lot of water. I love outdoor activities like hiking and kayaking so I'll need to stay hydrated on the trip.' 'Hi! I really need water also. I'm trying out a few new recipes, and they call for a lot of water.'
Utterance: 'Okay, maybe we can split the water and then divy up the rest. What else are you interested in?'

SOLUTION:
Yes