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.

Example Input: Context: 'No, I definitely need more water than that for my hikes,  ' 'can i get 3 food, 1 water and 0 firewood then?' 'I think that will work for me.  '
Utterance: 'perfect'
Example Output: No

Example Input: Context: 'I'd be willing to give you all my firewood if you could give me all the water.' 'I do need at least one extra water bottle in case the fire goes out of control, but I am willing to forgo any food as I can forage for food.' 'Alright. Thanks. I only ask for so much of the water because I am overweight and I know while camping I'll work up a huge sweat.'
Utterance: 'Great, that sounds good to me, are you okay with keeping all the food or would 3 be too much?'
Example Output: Yes

Example Input: Context: 'I'd like to have 2 extra packages of water and firewood.' 'I see. And I would like 2 extra packages of Food and 2 packages of  Water as well.' 'I have a great risk of dehydration.  I really need those 2 extra packages of water. You can have all the extra food.'
Utterance: 'Why do you have a risk of dehyrdation? Because I believe all people do but I do understand some people are at a greater risk then others. Tell me why you are at risk?'
Example Output:
Yes