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: 'Hi we would like you to consider giving us all of the rations for the trip.' 'hello, that could be a good idea, but I think I need more rations'
Utterance: 'How important are they to you? We would like to get a good mix, preferably more food.'

A: Yes
****
Q: Context: 'That would be fine.  I was hoping to have 2 but since I am only walking and you are doing more heavy duty hiking, you take them.  Agreed?' 'I really appreciate that. Do you think you will be okay with just 1 water since you have health issues?' 'That would be very nice, but I worry about you not having enough on the trail.  Dehydration would not be good.  I am pretty sure I can ration my supply to make it last.  🙂'
Utterance: 'You're a good friend! I'm excited to embark on this adventure! 🙂🙂🙂'

A: No
****
Q: Context: 'OK NO MENTION AND WHY YOU WANT FOOD' 'I tend to eat more food when I am active outside. I drink more water too because I don't want to get dehydrated.' 'OH OK '
Utterance: 'Do you have reasons for wanting food?'

A:
Yes
****