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: 'hello' 'Hi how are you?'
Utterance: 'I am good. How are You.   I was just thinking about how I need extra water due to a medical condition.  How about I take all 3 waters?'

Output: No


Input: Consider Input: Context: 'I am just concerned that only 1 firewood might make it so I'm too cold to function. ' 'If you boil the water above the fire, it will provide additional heat over time.  You would also be able to make tea, which would warm you up from the inside as well, better than any fire would.  That would probably be most beneficial to you.  I really do need the 2 firewood if there's any chance of making a bonfire for my party.' 'I am allergic to tea and coffee. I wonder if the smaller fire would be more quaint for everyone to sit around. '
Utterance: 'It really wouldn't do the job that well at all.  You could always prepare hot cocoa or use your share of the food to make a warm stew.  I really do need at least the two firewood and a couple of food.  You can have all the water to make a hearty and hot stew to get your through the night, though.'

Output: No


Input: Consider Input: Context: 'Sounds good.  I suggest you make a fire and relax. ' 'Just need a little more wood.  Then it will be great to cook my dinner on.' 'I got some spare wood. I’m a little short on food though. I didn’t pack enough. '
Utterance: 'Great, we can split the food, how are you on water?'


Output: Yes