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.

Context: 'Hi! I was hoping to get 2 packages of firewood, 2 packages of water and 1 package of food and you can have the rest.'
Utterance: 'Hello. Is there a reason you prefer more water and firewood to food?'
Yes

Context: 'Hi we would like you to consider giving us all of the rations for the trip.' 'hello, that could be a good idea, but I think I need more rations'
Utterance: 'How important are they to you? We would like to get a good mix, preferably more food.'
Yes

Context: 
Utterance: 'Hello fellow camper! I am interested to know your preference in items?'

Yes