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 brought purification tablets so I can make do with rainwater or river water.  How about you?' 'That's very smart! 🙂 Way to be prepared! I didn't think to do that.' 'So if we were to split the firewood more in your favor and I were to take all the food, and then we kind of split the water, I think we could maybe make a deal here?  🙂'
Utterance: 'I think that is definitely doable! I'd be glad to make a deal with you. Thanks for being so reasonable! 🙂🙂'

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


Ex Input:
Context: 'That does sound bad. I am going camping and my kids might want to stay up late so I will need extra firewood for this to keep light and more warmth. I will take all 3 extra of the food and the water but I need 2 firewood also.' 'no that won't work.  I will give you 3 food and 1 water.  I will take 3 wood and 2 waters.' 'I did not know you wanted water. Ok, that's great so I will take all 3 extra packages of food.As for the water I would like 2 waters because my dog is coming along with us for our trip and extra water for him will be needed.'
Utterance: 'i think i should have 2 waters because i will need to put the fire out to protect the forest.'

Ex Output:

No