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: 'Sending good luck your way! Any items in particular you need for your trip?' 'Well, I'll start with a trial offer and we'll go from there' 'Ok, offer away!'
Utterance: 'Well, food is high on my to do list only because I have a big family and we all know how they eat..... Wood well, I can find that along the way if necessary, and same as water so both of those are fairly low on my list... you?'

A: Yes
****
Q: Context: 
Utterance: 'Hello there.'

A: No
****
Q: Context: 'Its good! I am looking forward to the activites i'll be doing, such as campfires.' 'Hey, that's great. Good to hear definitely. I am also looking forward to build some campfires and enjoy some s'mores!' 'Thats great! Would it be okay if I got 2 packages of firewood, and 1 each of the food and water?'
Utterance: 'I would've like to have 2 packages of firewood instead. How about I give you all the extra water packages?'

A:
No
****