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: 'It's better to give 2 packages on both ' '2 packages of both of what?  Water and food?' 'I mean water and food'
Utterance: 'Is food something you need the most of or is it water?'

SOLUTION: Yes

PROBLEM: Context: 
Utterance: 'Hi, I brought some water with me. How much do you need? '

SOLUTION: Yes

PROBLEM: Context: 'Me too! Is this your first time?' 'I have been camping before, but it has been a while. You?' 'Same for me!!'
Utterance: 'What sort of extra supplies are you looking for?'

SOLUTION:
Yes

