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: 'Okay so I'm planning this super cool backpacking expedition up the waterfall but I'm going to need all the additional water and food for everyone.' 'All of the additional water and food? That doesn't seem very fair. ☹️' 'Well I'll be splitting it with everyone on the trip as we go up. The people that choose to stay will still get all their basic supplies of food and water. The backpacking trip is going to take three days though, we're gonna need the resources😮'
Utterance: 'I see. Which resource do you desire most?'
Example Output: Yes

Example Input: Context: 'Hello!🙂' 'Hello, how are you?' 'I'm fine, let's talk about how we can come to a fair deal.'
Utterance: 'Sure, my number one item if food if you can spare any.'
Example Output: No

Example Input: Context: 'Most needed is both food and water. I guess food is my highest priority .🙂' 'Ok perfect, the item I need the most is water because I need to hydrate.  What do you think if I give you 2 food and I keep 2 of water. ' 'Ii understand , the problem  is ctheere is 3 of us. What if  we have 2 food and 2 water and you have 2 firewood ?🙂'
Utterance: 'The object I need the most is WATER, so I cannot give you 2, I am giving you 2 FOOD since it is what you most need. Remember that we must both be satisfied for this to work🙂'
Example Output:
No