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: Consider Input: Context: 'one of my kids is on medication so we are going to need to pack a lot of water. so if could spare that it would be appreciated.' 'Well sadly I plan to go hiking a lot so I will need lots of water, but perhaps we can come to a reasonable agreement if I have to shorten my hikes.' 'ok what do you have in mind?'
Utterance: 'Well if I gave you a majority of the water, I would like 1 water, 3 firewood and 1 food.'

Output: No


Input: Consider Input: Context: 'yes of course!' 'great!' 'So we have agreed i get 2 foods and 3 waters and you get 1 food and 3 firewood? does that sound good?'
Utterance: 'I thought you just wanted 2 waters?'

Output: No


Input: Consider Input: Context: 'Hello there. I'd like to discuss making a deal.'
Utterance: 'yes, what would you like?'


Output: Yes