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: 'What is it that you really need on this camping trip?'
Utterance: 'I really need some more food. I only have the basics, and I'm afraid it's not going to be enough. What about yourself?'
[EX A]: Yes

[EX Q]: Context: 'I agree! Nice to meet you... I have two boys who always eat! Any chance I canget 2 food?' 'Food is the item of greatest value to you?' 'It is! What do you think?'
Utterance: 'The item of greatest value to me is WATER. Before thinking about an offer I need to know what your priorities are and you need to know mine in order to conclude something fair for both of you.'
[EX A]: Yes

[EX Q]: Context: 'Hello there! How are you today?' 'I am fine . How about you?'
Utterance: 'I am doing well so far. 🙂 What items are of preference for you today?'
[EX A]:
Yes