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! I like to hike so I really need more water. Could I take 2 packages of water and 1 of food and 2 of firewood?'
Utterance: 'I am ok with the water, i just would like one water and one food, but i would appreciate two firewoods, i get cold at night  '

A: No
****
Q: Context: 
Utterance: 'Hello! I am a mother of two and I have two kids who need extra food and water'

A: No
****
Q: Context: 'Hi  I have an extra guest that will be camping with me and was wondering if you had an extra food package that you could spare?' 'I don't have much food, but you can take one package and I can take two? ' 'thanks  that would be great!  I also need an extra package of firewood, I will probably need it cooking.  Do you have a spare package of it as well?'
Utterance: 'I don't need much firework, so you could have two packages. Could I take all of the water so I can wash my clothes? '

A:
No
****