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.

Input: Consider Input: Context: 'Hi i'm really excited for camping. I am looking for food and water ' 'Yes, a much needed getaway. Oh my, we need the same provisions! How would you be with receiving two waters, one food package, and two of the firewood?' 'I think I would be able to make that work. What are you looking forward to while camping? '
Utterance: 'Mainly cooking because I love to eat. It will be fun this time because I am leaving the kids at home. I also love swimming if we can find a river or big stream. How about you?'

Output: Yes


Input: Consider Input: Context: 'It will be nice to get out and explore the great outdoors, even if it is super hot!' 'I agree. What supplies could you use more of?' 'Water for sure, need to stay extra hydrated.  How about you?'
Utterance: 'Haha yup I had a feeling about that one. ;-) Yeah my wife has a bunch of crazy hikes planned so water is a must here too. What else?'

Output: Yes


Input: Consider Input: Context: 'I would like some extra food in case I get hungry.' 'Okay that sounds ok, I can do without the food. I also need two packages of water because it will be very hot out.' 'I can give you 2 packages of water.  I think there is plenty of water, so I do not need extra water.🙂'
Utterance: 'What are you going to use your water for?  And thank you.'


Output: Yes