You will be given a definition of a task first, then some input of the task.
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: 'absolutely! the kids are absolutely looking forward to it. It's their first time' 'Yeah! we are going hiking after we unpack. We need a lot of water...' 'So do we. My kids are on meds so they need a lot of water and food'
Utterance: 'Which one do you prefer most?'
Output:
Yes