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: 'Hi there, how are you doing today?' 'I am doing well, thanks! ' 'That's good to hear. I am going camping this weekend and need some extra supplies. What about you?'
Utterance: 'That's great! I also have a comping trip planned. We will be having an all night dance party. I could definitely use some extra supplies. What are you in need of the most?'

SOLUTION: Yes

PROBLEM: Context: 'I have a lot of people here.I need food.' 'I also need food, but am willing to share and give you extra firewood so you can cook more food. I am not able to hunt or fish and the extra food will help if I am not able to get around. ' 'I can share water for firewood.'
Utterance: 'Optimally, I would like 3 food and 2 water which would leave you with 0 food, 1 water and 3 firewood. I think it will be easier if you also tell me your optimal wants then we can go from there.'

SOLUTION: Yes

PROBLEM: Context: 
Utterance: 'Hello I would like to have more water then what I got because I drink a lot'

SOLUTION:
No