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 have sicked people and kids so i must need food water fire wood. please help me friend' 'I am sick and have a large family if we cant cooperate together we all get nothing' 'mind your words mr. i am in some trouble that's why i ask you this help. its not good man'
Utterance: 'Ok I am going to say this once before we both get nothing, I will get 3 Firewood, 2 Water and 0 Food. You will get 3 Food, 1 Water'
Example Output: No

Example Input: Context: 'I don't think you that fat, your lipids will help you stay warm and full out there, haha' 'Im not as good at you at foraginf for food and water i probably dont have the experience as you do being in the outdoors and living off the land.🙂' 'With the extra firewood, you can hunt for fish and other animals outside to thrive'
Utterance: 'i cant hunt if i dont have the proper nutritional value to make sure i can make it that long.  how about i get 2 firewood 2 water and 1 food you get the rest'
Example Output: No

Example Input: Context: 'I could manage with one firewood and two foods, but if you have canteens for everyone, may I then have all three waters? I had planned to collect water from the river, but I'm worried I may get sick.' 'you pointed out that we will need more!  😮 i will take 2 waters' 'I didn't know you had supplied everyone with water before the trip. I was merely trying to look out for your needs, but you said you didn't need them!'
Utterance: 'I am giving you a lot of food. You are being unreasonable and backtracking. You are getting some of everything with my offers, and there are only two of you.'
Example Output:
No