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.

Example Input: Context: 'I need a lot of food as well but I'm willing to sacrifice it if I get all the firewood and water.' 'Thank you.  WOuld you be willing to give me all the food?  I would give you all the water and 2 firewood.' 'I can give you all the food and 1 water. I get all firewood and 2 water.'
Utterance: 'I need at least one firewood to cook my food.  Can you give me one firewood for all the water?'
Example Output: No

Example 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?'
Example Output: No

Example Input: Context: ' Hallo, how are you doing?' 'i'm well! how are you doing?' 'Good, but in shortage of some stuff.'
Utterance: 'likewise! what do you need?'
Example Output:
Yes