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: 'It's better to give 2 packages on both ' '2 packages of both of what?  Water and food?' 'I mean water and food'
Utterance: 'Is food something you need the most of or is it water?'
[A]: Yes


[Q]: Context: 'That could work, were not really looking to have a big fire' 'Where do you stand on water? We're low , and may need extra in case the fires go out of control' 'I do need some myself as well'
Utterance: 'I suppose it is important - we'll definitely have split that up somehow. '
[A]: No


[Q]: Context: 'The 2 packages of food and 2 waters. I get thristy a lot too.' 'Ok, well if I can have 3 packages of firewood, 1 water and 1 food, you can have 2 packages of food and 2 waters. Does that sound good?' 'I like that deal. '
Utterance: 'Sounds good.🙂'
[A]:
No