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: 'It's been so cold these last few days, I'm worried that I didn't bring enough wood for the next few nights.' 'That is unfortunate. How about I give you are my firewood for all your food?'
Utterance: 'That is a very generous offer but I think I need to keep some food to be safe. Do you need any water?'

Output: Yes


Input: Consider Input: Context: 'Hi there.. we're looking forward to this camping trip.. hope you are, too!  Is there anything in particular you guys need / want out of the extra stockpile we've got?' 'Hello! Which item do you need the most?' 'Well we actually really NEED all three items.. but I know you might, too - so I want to make a deal that's fair for you.. is there anything in particular your family needs for the trip?'
Utterance: 'Well, there has to be an item that you need the most. If you tell me what you need the most, we can try to make a deal around it.'

Output: Yes


Input: Consider Input: Context: 'I would be OK with two packages of water.' 'Good. 2 packages of wood for me. 1 for you. 2 packages of water for you, and one for me. How should we divide the food?' 'I will take 2 packages of food and 1 for you.'
Utterance: '😮I thought you didn't need so much food, because of your diet....'


Output: No