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: 'hi' 'Looking forward to camping' 'same, i love to camp'
Utterance: 'What do you need most when camping? I hate splitting wood, so  I need firewood'

Ex Output:
Yes


Ex Input:
Context: 'That is a very generous offer, which I very much appreciate. But I am also worried that I could run out. What if I take 2 foods, give you 2 firewoods, and 1 water?  ' 'Would you be willing to give me 1 food, 2 firewood, and 2 water?' 'I could make that work 🙂 I'm sorry if I came off mean, I'm just trying to make sure I'll be ok. I don't camp often, so I'm not sure how to prepare.'
Utterance: 'I understand. What are you using the extra food for?'

Ex Output:
Yes


Ex Input:
Context: 'how about i get 2food because it is very important to my health' 'Okay, how about you get 2 firewood, 2 food, and I get 1 firewood and 1 food and all the water?' '☹️ no i also need water,i get dehydrated easily'
Utterance: 'So do I, especially since I'm doing a lot of hiking.'

Ex Output:

No