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.

[Q]: Context: 
Utterance: 'Hello fellow camper! I am interested to know your preference in items?'
[A]: Yes


[Q]: Context: 'Then it is good deal.  I need two wood, 1 food, and 1 water.' 'I really need all the food, I have a lot of people to feed' 'I will provide you the food, but I am asking only one for my people.'
Utterance: 'I am giving you all the water,  how come you need the food? '
[A]: Yes


[Q]: Context: 'hi 🙂' 'I was thinking that you could give me 3 food packages and i will give you 3 water? What do you think?' 'If I do that I would also like all three firewood'
Utterance: 'Why do you need all 3 firewoods?'
[A]:
Yes