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.

Example Input: Context: 'I am in dire need of firewood myself. I was planning on bringing food that needed to be cooked over flame. 😮' 'Well maybe we can find a way to split it!  This isn't a problem we can't solve.  Are you in need of food too, then?' 'That would be great! I don't need food as much as I am in need of firewood, to be honest.'
Utterance: 'I brought purification tablets so I can make do with rainwater or river water.  How about you?'
Example Output: Yes

Example Input: Context: 'Yes, how about you! We are headed to Joshua Tree NP to do some rock climbing and hiking. ' 'Ooh rock climbing! I'm definitely scared of heights, so that's out for me. I'm heading to the Puget Sound to camp near the ocean.' 'My wife is from the puget sound. Was just up there a month ago.  I am looking to take the food and water.  We have a large group and will be active.  We will have some hot and dry conditions in the desert. Some are high school age students with big appetites.  What are your preferences.'
Utterance: 'I was definitely looking to have food and firewood most of all. There are plenty of places to collect rainwater and get fresh water in Puget Sound, but we're lacking in food and will need firewood to start a campfire at night.'
Example Output: No

Example Input: Context: 'so if i were to  give you water what would i get ?' 'You'd be getting 1 water, 2 firewood, and 1 food' 'how much food are you willing to offer for water'
Utterance: 'We can go back to my original offer which was honestly more generous.. I get 2 Water, 1 Firewood, 1 food.. you get 1 water, 2 firewood, 2 food.. its honestly a better deal for you 🙂'
Example Output:
No