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: 'Hi. Why do you need so many food packages?' 'Well, I have two teenage boys who will be with me.  In normal circumstances they go through a lot of food.  While camping, hiking and kayaking I know we will need plenty to keep their energy level high to do everything.🙂' 'Well I will definitely need 2 packages of food and 2 of firewood for survival.'
Utterance: 'I am definitely ok with giving you two of the firewood!!  Why do you need 2 packages of food?'

A: Yes
****
Q: Context: 'It's better to give 2 packages on both ' '2 packages of both of what?  Water and food?' 'I mean water and food'
Utterance: 'Is food something you need the most of or is it water?'

A: Yes
****
Q: Context: 'Hello I need a lot of water to survive' 'I have a lot of water around me I can use. So I can give you a lot of extra.' 'Ok nice I will give you 3 food if you give me 3 water'
Utterance: 'OK, that works for me. But I would like a lot of firewood. I like to hunt and cook what I kill.'

A:
No
****