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.

Context: 'Hello, I was hoping we can chat. '
Utterance: 'Hi there. '
No

Context: 'Hi there! How are you?'
Utterance: 'Great! I'm very excited to go camping, how about you?'
No

Context: 'I see. And I would like 2 extra packages of Food and 2 packages of  Water as well.' 'I have a great risk of dehydration.  I really need those 2 extra packages of water. You can have all the extra food.' 'Why do you have a risk of dehyrdation? Because I believe all people do but I do understand some people are at a greater risk then others. Tell me why you are at risk?'
Utterance: 'I have a medical condition that requires medication, and this medication requires me to drink an extra amount of water or else I will dehydrate. '

No