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.

[EX Q]: Context: 'I am going to submit my initial offer now.' 'ok'
Utterance: 'So I really don't need that much firewood. I am willing to give you all 3. What is your situation?'
[EX A]: Yes

[EX Q]: Context: 'Awesome, I'd be happy to negotiate that. What is your second most needed item?' 'I'll need water. My kids take medications and need to stay hydrated.' 'Absolutely. My second most needed item is food so that works out well.'
Utterance: 'Well I am happy to give you all my food in exchange for all your water.'
[EX A]: No

[EX Q]: Context: 'Yeah that's fine.What you need the most?' 'I need food because I have mouths to feed and maybe a firewood?' 'Okay . How much You need each?'
Utterance: '3 Food and 1 Firewood? You get the rest?'
[EX A]:
No