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: 
Utterance: 'Hi fellow camper! What are your needs for the extra provisions.'

A: Yes
****
Q: Context: 'Forest, for sure. Deserts have scorpions and tarantulas and I'm scared of those.' 'Amen! Me too! 🙂 I too was thinking of going to the forest. Is your forest going to be wet or pretty dry?' 'It'll be pretty dry. I don't want to catch a cold. '
Utterance: 'I wanted to a rainforest near where I live. I love listening to the rain. Did you think that you were going to need all of the firewood since you can get dry wood from the trees?'

A: Yes
****
Q: Context: 'Hi! I'm really hoping to get a lot of water. I love outdoor activities like hiking and kayaking so I'll need to stay hydrated on the trip.' 'Hi! I really need water also. I'm trying out a few new recipes, and they call for a lot of water.'
Utterance: 'Okay, maybe we can split the water and then divy up the rest. What else are you interested in?'

A:
Yes
****