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: 'I'm sure we can come to some compromise. I know my sister and I want to make s'mores in the evening. How about I get 2 food and 1 firewood, 1 water and you get the rest? ' 'I love s'mores.  Food is my number one concern though.  If I'm only getting 1 of the food I really need all of the water.  How does that sound?' 'So I get only 3 packages? 2 food and 1 firewood? '
Utterance: 'Do you need more firewood?  I could compromise there.'

A: Yes
****
Q: Context: 'Hello! how are you doing?'
Utterance: 'Hello, I would like to keep the 3 extra packages of firewood an 2 extra packages of water.  You can have all 3 packages of water and 1 package of food.'

A: No
****
Q: Context: 'Me too! Is this your first time?' 'I have been camping before, but it has been a while. You?' 'Same for me!!'
Utterance: 'What sort of extra supplies are you looking for?'

A:
Yes
****