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.
Q: Context: 'Can I take all three bundles of firewood so I can boil some of the water? ' 'Sorry, I want some firewood, I planned to enjoy this chill climate using firewood' 'Alright. If you take one firewood can I also have two packages of food? '
Utterance: 'That doesn't work for me, May I ask why do you need two packages of food?'
A: 
Yes