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 will give you 3 firewoods and I will take 3 water and 3 food.' 'This is not work for me at least give me one more water package' 'Nope, take it or leave it.'
Utterance: 'That's okay thank for your deal'

Ex Output:
No

Ex Input:
Context: 'Then How about I get two foods, 1 firewood and 1 water?' 'Like i said food is my top priority so i will not do well with less than 2.' 'Then you get two food and no firewood here.😮'
Utterance: 'You mean you can't let up one firewood for me?'

Ex Output:
No

Ex Input:
Context: 'Okay that would be fine. If I can have 3 packages of firewood, you can have 2 packages of food. Does that work?' 'That does not work for me. I need at least one package of firewood. I'm sure you understand, because it seems like we have medical conditions with similar effects. You can take all of the water if I can get 2 packages of food and 1 of firewood. Does that work?' 'I do understand. That will work for me. '
Utterance: 'Could you tell me about why you want water? '

Ex Output:
Yes