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: 'Hi! I'm super excited to go camping with my family as a great way to vacation due to Covid19. My kid is so restless from being cooped up in the house all the time. Are you planning on going camping too?'
Utterance: 'I am! It is the perfect way to get away and still manage to social distance! I am worried about having enough water though, are you short on any supplies?'
Example Output: Yes

Example Input: Context: 'I need to stay hydrated because the weather is hot. I am trying to lose weight so I do not need much food.' '😮I see. I have a medical condition that causes my veins to close if I get too cold. I need more firewood to make sure I don't freeze at night.' 'Would two of the firewood be enough?'
Utterance: 'Maybe... I could perhaps do with 2 firewood. But, I would like at least one packet of water.'
Example Output: No

Example Input: Context: 'I understand, but I don't need any extra firewood. You could have 2 food, 3 firewood, and 1 water?🙂' 'Well I am going to have to think about this deal. Perhaps I can contact my friend and see if he can get some extra water. He is a big eater so the food may come in handy. ' 'That would make things better for me. '
Utterance: 'Can I ask you why you need so much water for one person? '
Example Output:
Yes