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: 'Great! What extra supplies would you like to bring?' 'Since it's hot there, I get thirsty and dry real quick. 😡' 'Oh ok, well I plan on bringing some juice, beer and other drinks. So I could spare some extra water. And I am pretty good at fishing, so I won't need much food either'
Utterance: 'How nice of you. I certain we can work something out. 🙂'
Example Output: No

Example Input: Context: 
Utterance: 'Hey!  I hope you're having a good week and staying well.  So we are negotiating on supplies! 🙂'
Example Output: No

Example Input: Context: 'Hello' 'Hi can I ask what camping supplies you most need?' 'I would like the 3 food packages because my sister forgot to pack any food items for the trip. You can have all the water and firewood. '
Utterance: 'Oh no!  I have my daughter with me and she really likes to eat.  I was hoping to get at least some of the food.  Do you need water or firewood more?'
Example Output:
Yes