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.

[EX Q]: Context: 
Utterance: 'Hi! I am interesting in claiming all 3 of the water, as well as 2 firewood and 1 food. Does this work for you?'
[EX A]: No

[EX Q]: Context: 'That's a good idea.  I'll trust you to do the coin flip.  ' 'Sure.  🙂  I'll grab a coin.' 'Calling tails.  '
Utterance: 'Looks like 2 to you!  So it's 3 water and 1 food to me then, 3 firewood and 2 food to you?'
[EX A]: No

[EX Q]: Context: 'I can give you 3 packages of food but I really need the additional firewood.' 'I like that. How about 3 water for you and 1 firewood?' 'I can give 3 packages of food and 1 water.  '
Utterance: 'So 1 firewood, 0 food and 3 water for you?'
[EX A]:
No