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.

Example Input: Context: 'What about I take 2 of the packages and you take 1? I know teenagers also drink a lot of water haha 🙂' 'He definitely does drink a lot of water, but he's in a growth spurt so 2 would be ideal. I'm happy to give up all firewood in exchange for the extra food!' 'okay that sounds like a better deal then! I will take all the firewood and 1 food, and you can take the 2 food packages'
Utterance: 'Awesome, I appreciate that. How does the water need look on your side?'
Example Output: Yes

Example Input: Context: 'Since it's hot there, I get thirsty and dry real quick. 😡' 'Oh ok, well I plan on bringing some juice, beer and other drinks. So I could spare some extra water. And I am pretty good at fishing, so I won't need much food either' 'How nice of you. I certain we can work something out. 🙂'
Utterance: 'How about I get 3 firewood 0 water 2 food, and you get 0 firewood 3 water 1 food?'
Example Output: No

Example Input: Context: 'Hi! I look forward to making a trade with you that's good for us both.'
Utterance: 'Me too, hopefully we can get together on a deal.'
Example Output:
No