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 Q]: Context: 
Utterance: 'hi, how are you? my main need is water. how bout you?'
[EX A]: Yes

[EX Q]: Context: 'Hi, I appreciate your response. I would like to compromise. I will give you the bundle of firewood you requested as well as the 2 packages of food. However, I would like to get 2 jugs of water. I have 2 other adults with me on this trip and they require more water to stay hydrated than a baby would.' 'That actually sounds pretty good to me. 🙂' '🙂'
Utterance: 'So, it looks like we have reached a compromise. '
[EX A]: No

[EX Q]: Context: 'I don't really need food, to be honest. Food is the least of my worries.' 'how about 1 water, 1 firewood and 3 food ?' 'For you?'
Utterance: 'yes. I am yet to know your priority. Which I guess should be either water or firewood'
[EX A]:
Yes