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 need food because I have mouths to feed and maybe a firewood?' 'Okay . How much You need each?' '3 Food and 1 Firewood? You get the rest?'
Utterance: 'That's fine.I will accept your deal.Tell me the reason why you need the item?'

A: Yes
****
Q: Context: 'Firewood is not overly interesting to me, but water is somewhat enticing.' 'Ok, great - I can give you all of my waters in exchange for a majority of the food and half of firewood' 'Half of firewood? There are 3 so one of us has to get more. I would need more of that. '
Utterance: 'Yep, I know there's three and no way to split evenly lol - can you give me a justifiable reason as to why you deserve more over me? Please convince me.'

A: Yes
****
Q: 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!'

A:
No
****