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 will give you that in exchange for 1 food and 3 water with 2 firewood' 'please consider my request i'm big in size so please accept to give two pack of food and 2 water and 1 firewood' 'cool'
Utterance: 'do you accept my deal?'
Example Output: No

Example Input: Context: 'I'm headed to the mountains. How about you?' 'It's in Upstate New York, near a gorgeous lake. I like it because it's secluded and very peaceful. ' 'Sounds good. I'll be doing quite of a bit of cooking over an open fire during my trip.'
Utterance: 'Wow. That sounds great! There's nothing like campfire cooking on a chilly night! I'll doing a lot of that too, but I also want to enjoy swimming as much as I can🙂 '
Example Output: No

Example Input: Context: 'Pretty good. Just hanging out with our group. Looking forward to this upcoming camping trip. It's a college reunion weekend. ' 'Oh.  That sounds fun.  I'm getting ready to go camping with my family next weekend as well.  It will be the first time that my kids have gone camping with me.' 'Aw that will be a great time then 🙂 How old are your kids? '
Utterance: 'My kids are 14 and 12.  So they're fairly independent - but I also know that they want to do a lot of cooking during our camping trip.  Thus, I think that I'm going to need more firewood as I expect that we'll be having a lot of fires while we're out.  How about you?  What are you planning to do on your camping trip?'
Example Output:
Yes