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.

Input: Consider Input: Context: 'Pretty good! I am looking forward to going on this camping trip with my family.' 'Same here! We had a couple bumps in the road though, as our freezer stopped working so all our food went bad ☹️' 'That is rough ☹️ We should try to split the resources equitably then'
Utterance: 'Ya definitely. I need food and firewood most. What do you need?'

Output: Yes

Input: Consider Input: Context: 'I have a medical condition that require me to drink a ton of water. I also can only eat certain foods and I have 3 kids. The more food and water the better for us.' 'sorry to hear that. i too have kids but my health is ok so i can do with 1 water.' 'Thank you. 🙂 Would 1 food and 3 firewood work for you?'
Utterance: 'No problem🙂, i would be fine with 1 water, 1 food,and 3 firewood.'

Output: No

Input: Consider Input: Context: 'That is a problem. Does the medication require the use of fire or firewood as well?' 'No, of course not. You can have the extra of those if you'd like. It is really the water that is the most important to me. ' 'Hmmm... I don't really need the firewood,just the food which you are offering and the water. '
Utterance: 'Okay, can I have the 2 waters and 2 firewood then? I will give you all of the food, and 1 of the water. Do you need any firewood at all?'
Output: Yes