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 no-need strategy, otherwise output No. no-need is a cooperative negotiation strategy. It is used when a participant points out that they do not need an item based on personal context such as suggesting that they have ample water to spare. no-need can directly benefit the opponent since it implies that the item is up for grabs.

Input: Consider Input: Context: 'Of course, it's always wise to bring things. We absolutely need water and some food. Water is critical though.' 'You got that right!  I just came from a three-day rugby tournament and I am totally dehydrated.  I hope they have enough at the site.  I also get the chills bigtime when I am dehydrated. That's how I know I am very dehydrated...' 'I'm good to give up firewood for more water and food.'
Utterance: 'Thanks!  You can have all the extra food. My pockets are jammed full of munchies.  But water is something it seems we both really need.'

Output: Yes


Input: Consider Input: Context: 'What if I take 1 more firewood, so I would have 2?' 'I mean I would gladly trade a water and firewood for one of your extra food. ' 'No, I really do need the food the most. Let's go back to your original deal? I'll take 2 foods, you get one. I'll take 1 water, 1 firewood, and you take the rest? Do I have that right?'
Utterance: 'Yup'

Output: No


Input: Consider Input: Context: 'Oh I understand that for sure. I am not used to the cold weather either which is not helping. Would you be interested in a trade for water in exchange for firewood? ' 'Well, I am worried about staying hydrated as well.' 'Do you have food? I have been trying to hunt but have not really found any animals nearby to hunt.'
Utterance: 'I do actually!  I can give you 3 foods. Would that work?'


Output: Yes