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.

Q: Context: 
Utterance: 'Hello! Do you have any sort of preference regarding the 3 camping items?'

A: Yes
****
Q: 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 🙂'

A: No
****
Q: Context: 'What about you take 1 water and the firewood.  I take 2 waters and all the food' 'That leaves me with very little. Can I have 1 water, 2 firewood, and 2 food?' 'you would get 1 water and all 3 firewood.  I would get 2 water and all 3 food.  You have one less than me but the food is worth less'
Utterance: 'I will make it work. Let's make a deal!'

A:
No
****