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.

Context: 'But you need firewood for leisure, whereas I need firewood for survival.' 'Well it will keep us warm at night, too. I am very keen on at least one firewood for myself. ' 'Ok. How about I take 2 firewood and all 3 food? You can have the rest.'
Utterance: 'Can I get at least one food?'
No

Context: 'yes we have to supply more how much you want' 'I would like 3 firewood, and 2 food.  You can have 1 food and all of the water.' 'oh okay I will send you what are the materials you have'
Utterance: 'I already have a good supply of fresh water from the lake I will be camping by, and can hunt for some food but not all.  What are you in need of?'
Yes

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?'

No