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: 'Oh, so sorry to hear that.  I can understand why water would be important to you.  I am worried about being too cold at night. My sleeping bag is not rated well for cold weather (I packed the wring one).' 'Oh I understand that for sure. I am not used to the cold weather either which is not helping. Would you be interested in a trade for water in exchange for firewood? ' 'Well, I am worried about staying hydrated as well.'
Utterance: 'Do you have food? I have been trying to hunt but have not really found any animals nearby to hunt.'
Yes

Context: 'food is necessary for all living beings. ' 'I am traveling with a big group so we need more water.'
Utterance: 'lots of water only for when u have thirsty'
No

Context: 'Hello' 'Hello! I am going on an expedition and am in need of provisions. The risk is much, the need is great, but the rewards are even greater! I am asking that you might allow me to have 3 firewood, 2 food, and 2 water.'
Utterance: 'Why do you need so much firewood?🙂'

Yes