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: 'hi! thats awesome i am going camping too, but not a lot of hiking. I am bringing 2 teenage boys so food will be very important for us' 'I definitely understand that, kids can eat a lot. I can spare 2 extra food for all the water. ' 'that will work for me - how about i take 2 food, and all the firewood - i am hoping to teach my boys campfire songs - they need other hobbies that dont include electronics :). You can have 1 food and all the water? '
Utterance: 'I would like just 1 firewood so we can have a smores night with the younger kids if that works?'
Example Output: No

Example Input: Context: 'I'm good, how are you doing today?' 'I'm doing great! I'm on the first camping trip with my five children.' 'Wow, that's amazing. My parents took me camping when I was young. Now we going hiking every other weekend. What do you plan on doing?'
Utterance: 'That sounds like so much fun! I hope we get to hike some. I have my four month old baby with us which is exciting. I'm worried I didn't bring enough water for his bottles, though.'
Example Output: No

Example Input: Context: 'I would like 1 or 2' 'OK' 'Could I have 2 firewood?'
Utterance: 'Ok'
Example Output:
No