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: 'Would you be willing to let me have all the firewood and you could take 2 of the food and 2 of the water?' 'No I can't do that unfortunately./' 'Ok, so I could take 2 firewood, 1 food, and 1 water, the original deal, do you still want to do that one?'
Utterance: 'I would prefer the original deal'
Example Output: No

Example Input: Context: 'Hi. Why do you need so many food packages?' 'Well, I have two teenage boys who will be with me.  In normal circumstances they go through a lot of food.  While camping, hiking and kayaking I know we will need plenty to keep their energy level high to do everything.🙂' 'Well I will definitely need 2 packages of food and 2 of firewood for survival.'
Utterance: 'I am definitely ok with giving you two of the firewood!!  Why do you need 2 packages of food?'
Example Output: Yes

Example Input: Context: 'Sounds good.🙂' 'I think this would be a good even split of resources and would allow each of us to have extra supplies. 🙂' 'I agree with you.'
Utterance: 'All that is left is to submit our deal. Nice working with you!'
Example Output:
No