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.

Input: Consider Input: Context: 'I also would prefer some food but am willing to give 3 fire wood in exchange for 3 water. I suffer from chronic dehydration because I sweat too much.' 'Excellent, I would love to help you out.  We have plenty of water to spare.  I'd gladly give you 3 water in exchange for 3 firewood.' 'Cool! To show my gratitude, i will give you the extra food. I will have 1 and you will have 2. Is that a good deal?'
Utterance: 'Yes, deal!  I get 3 firewood, 2 food, 0 water.  You get 3 water, 1 food, 0 firewood.  Thanks - have a great day!'

Output: No


Input: Consider Input: Context: 'I may be able to do something with regards to food. Do you have enough water?' 'I have more water than I need. How is your water supply?' 'I could use some more water as I get dehydrated easily. Since you have enough, I could give you and extra package of food for your water.'
Utterance: 'That sounds like a deal, what would you like to do as far as the firewood goes?'

Output: No


Input: Consider Input: Context: 'Hello! Which item do you need the most?' 'I would love to have the Firewood the most. '
Utterance: 'Unfortunately I need firewood the most too. How about I take 2 firewood, 2 food, and 1 water?'


Output: No