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.
Input: Context: 'Looking forward to the trip.  They gave up the bare essentials but I could really use some extra supplies.🙂' 'I could too, I am a little short on a few things!' 'My biggest concern is water.  I could really use more.  That and some extra food.'
Utterance: 'My biggest concern is food and then water. '

No