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: 
Utterance: 'Hello. I am so looking forward to this camp out. My daughter just called and said she is going to come and bring some of her firiends. 🙂'
Example Output: No

Example Input: Context: 'hello' 'Hello there' 'how is your day going?'
Utterance: 'So far so good.  What are your plans for your camping trip?'
Example Output: Yes

Example Input: Context: 'Water is my second priority item. I am sure we can work out a fair deal. What do you propose?' 'We'll be able to make it close to equal. Let's do 2 foods for one of us, 2 waters and 2 firewood for the other person. I'll take either.' 'Ok that works for me 🙂 2 food for me, 2 firewood and 1 water. Then you get 2 water and 1 food and 1 firewood. Does that work?'
Utterance: 'No close. 2 food 1 water 1 firewood for one of us. The other gets 1 food 2 water 2 firewood. Food is your number one correct?'
Example Output:
Yes