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: 'food is necessary for all living beings. ' 'I am traveling with a big group so we need more water.'
Utterance: 'lots of water only for when u have thirsty'
Example Output: No

Example Input: Context: 'good here, I will need 3 water as I need it to survive' 'I need water as well.  I require it for subsistence' 'how many water you need?'
Utterance: 'In a perfect world, all the water 🙂'
Example Output: No

Example Input: Context: '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.  ' 'Can I ask you why you need so much water for one person? '
Utterance: 'Hiking in the summer, I sweat a lot and I don't want to risk getting dehydrating and sick out in the woods.'
Example Output:
No