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: 'Hello, I was hoping we can chat. '
Utterance: 'Hi there. '
Example Output: No

Example Input: Context: 
Utterance: 'Hi there! I was looking for 3 extra packages of food and 3 packages of firewood.'
Example Output: No

Example Input: Context: 'Yeah, it's very sad these days' 'Then I got here and noticed I didn't pack my cooking sterno and critters go into some of my food☹️Kinda puts a damper on the trip.' 'Oh, i see. How about you get 2 food 1 firewood and 1 water. I need the extra firewood to stay warm at night'
Utterance: 'Yeah, that should work. I brought plenty of water and the critters left that alone. You planning to go out on the trails at all?'
Example Output:
Yes