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 Input:
Context: 'I'm interested in hearing more about why you want a 2/1 split: Is the food worth more to you than the third firewood? If so, I'm happy to do that split, but I'd like 3 water in return.' 'Okay, like I said I have two growing boys with a very healthy appetite.  They will make my life miserable if they don't have enough to eat.  I would be willing to give you the 3 water.' 'ok, that sounds like a deal. 🙂'
Utterance: 'cool - thank you!  I guess we can submit that then'

Ex Output:
No


Ex Input:
Context: 'I am okay. How about I give you one and half then I get some firewood from you?' 'No I need at least 2 waters.  But I am willing to give you all 3 foods, if I get all the firewood.  Does that work for you?' 'Okay I will give you 2 waters. I actually need more of firewood. If I can get 2 I will be glad.'
Utterance: 'Well I really need the firewood because I have small kids with me and it would be hard for me to get some free time to get the firewood, but I would be willing to give you 2 firewood since I get two waters.  What are your thoughts about the food?'

Ex Output:
No


Ex Input:
Context: 'Hi! How is your camping trip going?' 'It's going good we could use some more supplies such as food and firewood, though.'
Utterance: 'Same here haha. Is water your lowest priority item too?'

Ex Output:

Yes