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: 'I think I'm good. I'm not 100% sure. My husband likes to do adventures on the fly. He got these water filter straw thingies from Amazon and said that if we run out of the water I packed, that we can drink the water in the lake but I don't really trust the straws.' 'Sounds like you need water too. How about you take 2 water, 1 food, and 1 firewood?' 'I don't know, you said you're worried about having enough water too. I'm excited to make campfires though! My kid hasn't had a campfire smore yet so I'm super excited to see his face of joy when he experiences it.'
Utterance: 'I am worried about water but also could use a little more food, just in case. I am looking forward to a nice campfire as well!'
[A]: No


[Q]: Context: 
Utterance: 'Hello. I am so looking forward to this camp out. My daughter just called and said she is going to come and bring some of her firiends. 🙂'
[A]: No


[Q]: Context: 'Hey how's it going' 'Good, looking forward to my camping trip.' 'Nice, I am too. I'm actually looking to gather up some extra supplies, what about you?'
Utterance: 'I need extra supplies as well. I'll be camping at a higher elevation and need extra firewood for warmth, extra food and some water. What do you need?'
[A]:
Yes