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: 'Hello, I will start out by saying that I would like to have 3 water because I do not have a nearby water source. What is your situation?' 'Hello. I have a health issue that I need to stay hydrated at all times. I do understand your situation though. '
Utterance: 'How much firewood and food do you think you need? '

A: Yes
****
Q: Context: 
Utterance: 'Hi, I'd like 3 packages of food. I have diabetes and my blood sugar could drop.'

A: No
****
Q: Context: 
Utterance: 'Hi!  I want some additional packages of firewood, water, and food'

A:
No
****