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' 'Hello, what would you like for the packages?'
Utterance: 'we are cold and hungry so we need firewood and food the most, what about you?'
Example Output: Yes

Example Input: Context: 'I would like 1 or 2' 'OK' 'Could I have 2 firewood?'
Utterance: 'Ok'
Example Output: No

Example Input: Context: 'I will take all the food and water then' 'That will be very unfair of you. How am i going to survive without water or food?' 'You have food and water, this is just extra supplies'
Utterance: 'I know but with my condition i may not make it, especially without more water.😮'
Example Output:
No