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: 'Hello!' 'Hey there. How are you doing?'
Utterance: 'Great! What do you look for most when camping?'

Output: Yes


Input: Consider Input: Context: 'I get tired to easy so I probably won't be much fun at a bonfire ☹️. I really do appreciate the offer though. I would think the extra food would do you more good for your party. ' 'The extra food would be appreciated.  How about if I take just two each of the firewood and food, and you can have the remainder, plus all of the water?' 'I am just concerned that only 1 firewood might make it so I'm too cold to function. '
Utterance: 'If you boil the water above the fire, it will provide additional heat over time.  You would also be able to make tea, which would warm you up from the inside as well, better than any fire would.  That would probably be most beneficial to you.  I really do need the 2 firewood if there's any chance of making a bonfire for my party.'

Output: No


Input: Consider Input: Context: 'I need food and firewood' 'I need water and then firewood' 'You can have all the water if I can have all the extra food'
Utterance: 'OK, but first tell me why you need extra food'


Output: Yes