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: 
Utterance: 'Hello, what are your preferences for food, water, and firewood?'

Ex Output:
Yes


Ex 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.'

Ex Output:
No


Ex Input:
Context: 'Hello, I'd like to bring three packages of firewood because I'll be making tons of BBQ for the camping trip.' 'Can I get 3 packages of food?'
Utterance: 'What do you need it for?'

Ex Output:

Yes