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 there! How are you today?' 'Good!  How are you?' 'I'm doing well! Almost ready for my camping trip. Need some more supplies though.'
Utterance: 'Which supplies do you need?'
Example Output: Yes

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

Example Input: Context: 'I also worried about those two items, especially water.' 'Yes, they say it supposed to be really hot the next few days.' 'yes, how do you suggest we share these resources?'
Utterance: 'Tell me, how stocked up are you on food and firewood?'
Example Output:
Yes