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 uv-part strategy, otherwise output No. uv-part is a selfish negotiation strategy. It is used to undermine the requirements of the opponent. For instance, suggesting that the opponent would not need more firewood since they already have the basic supplies or a suggestion that there might be a store near the campsite where the opponent can get the supplies instead.

[Q]: Context: 
Utterance: 'Hello!  I'm going to be heading out on a big camping trip and will need to take some extra supplies.  Are you going camping as well?'
[A]: No


[Q]: Context: 'I would like 3 packages of food, 2 packages of firewood, and 1 package of water.' 'That's not going to work for me at all, I would like 3 packages of water, 2 packages of food, and 1 package of firewood' 'That would leave me with no water. I would like 1 package of water, 2 packages of food, and 2 packages of firewood.'
Utterance: 'You'll have some water, this is for extra.  Would you take 2 packages of food and 3 packages of firewood in exchange for me getting 3 packages of water and 1 package of food?'
[A]: Yes


[Q]: Context: 'That's amazing!!!  So here is the deal...I'll give you the 2 firewood packages so you can sleep under the stars tonight.  In return I'll have to keep 2 water packages and 2 food packages since I won't be able to cook all of this fish and I still have a family to feed.  ' 'I'm glad you understand my problem. But I really need those 3 firewood packages. I'd be happy to give you 2 water packages and all the food in exchange.' 'Initially you were willing to take the 2 packages of firewood. If you have all three I won't be able to cook any of this fish and it will all go to waste. ☹️'
Utterance: 'Didn't you bring any firewood at all with you?'
[A]:
Yes