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: 'yes we have to supply more how much you want' 'I would like 3 firewood, and 2 food. You can have 1 food and all of the water.' 'oh okay I will send you what are the materials you have'
Utterance: 'I already have a good supply of fresh water from the lake I will be camping by, and can hunt for some food but not all. What are you in need of?'
[EX A]: Yes

[EX Q]: Context: 'Hi, what is your highest priority item?'
Utterance: 'I would love to have extra food for my trip, bringing the family! how about you?'
[EX A]: Yes

[EX Q]: Context: 'Hello! I'm looking forward to a big camping trip I've been planning for a long time this weekend. How about you? Do you have any plans?' 'Me too!!! I love camping! All that activity gets me wanting to indulge on snacks and then water to quench my thirst!'
Utterance: 'Same here. It looks like we both can use some water and snacks. Do you have any preferences of how much you will need? I was hoping to get 2 or 3 waters and 1 or 2 foods?'
[EX A]:
Yes