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.

Ex Input:
Context: 'Hmm, you're getting my top item there though. That still might work.' 'I think it's pretty fair since we'll both get at least one of our top item (firewood) and you get more food (I assume your second priority) and I get more water (my second priority)' 'Well you're getting more on 2/3.'
Utterance: 'True - but one of us has to 🙂.'

Ex Output:
No


Ex Input:
Context: 'Hello!  I'm looking forward to a big camping trip I've been planning for a long time this weekend.  How about you? Do you have any plans?' 'Me too!!! I love camping! All that activity gets me wanting to indulge on snacks and then water to quench my thirst!'
Utterance: 'Same here.  It looks like we both can use some water and snacks.  Do you have any preferences of how much you will need?  I was hoping to get 2 or 3 waters and 1 or 2 foods?'

Ex Output:
Yes


Ex Input:
Context: 'Hello, how are you?' 'Im good how are you?' 'I'm doing great, thanks.'
Utterance: 'How many of each supply would you like? what is your favorite?'

Ex Output:

Yes