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.

[EX Q]: 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.'
[EX A]: No

[EX Q]: Context: 'Yes I can't wait! So sick of being stuck at home. 🙂' 'It will be nice to get out and explore the great outdoors, even if it is super hot!' 'I agree. What supplies could you use more of?'
Utterance: 'Water for sure, need to stay extra hydrated.  How about you?'
[EX A]: Yes

[EX Q]: Context: 'Good morning! Are you excited to go camping this weekend?' 'Yes, how about you! We are headed to Joshua Tree NP to do some rock climbing and hiking. ' 'Ooh rock climbing! I'm definitely scared of heights, so that's out for me. I'm heading to the Puget Sound to camp near the ocean.'
Utterance: 'My wife is from the puget sound. Was just up there a month ago.  I am looking to take the food and water.  We have a large group and will be active.  We will have some hot and dry conditions in the desert. Some are high school age students with big appetites.  What are your preferences.'
[EX A]:
Yes