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 self-need strategy, otherwise output No. self-need is a selfish negotiation strategy. It is used to create a personal need for an item in the negotiation, such as by pointing out that the participant sweats a lot to show preference towards water packages.

Example Input: Context: 'Hello' 'hello, so what is your most important thing that you want? '
Utterance: 'my priority is firewood. What's yours?'
Example Output: No

Example Input: Context: 'Thanks for your understanding well I think if possible then to meet the situation then how bout 3 food and 2 water then you get all the wood ? That way you can have awesome campfires lasting through the night, we will be going to sleep extra early to wake up very early so we do not need all that wood, as much as we need food to replenish our energy and be ready for another day of long walks to see as much as we can from nature 🙂' 'I agree with you that campfires are awesome and I do find them to be be quite useful. I'm not as early of a riser as you are unfortunately! 🙂 I'm willing to accept your offer on food as long as you could please consider my needs for water. I am a very active hiker. While I don't need much food for my hikes I do require a lot of water. I once went on a hiking trip when I was new to the activity and ran out of water. I got lost and almost dehydrated! Ever since then it's been very important to me to have as much water as possible. What would it take in order for me to get as much water as possible keeping in mind that I'm willing to give you 3 food. ' 'Thank you for the food and I understand we do have to think about water being by far the most important thing in life since it bascially is right 🙂 and well how about then we go do two waters for you and one wood then so then we can have that wood for just in case and we can all be happy ?? thanks for your understanding'
Utterance: 'Yes. Water is the most important thing in life. Thank you for offering me two waters and one wood. However, this would mean that you would be receiving 3 food, 1 water, and 2 wood. That seems too unbalanced to me. It's important for me to also let you know that wood is very crucial for me. When I was a newbie I didn't bring any wood because I figured I'm fine since I'm not scared of the dark. That night a bear snuck on me when I was sleeping. Thankfully I was able to scare it away with noise. However, ever since then I've brought a lot of wood with me so no bears can sneak up on me. I would like to counter your offer with 3 waters, 2 wood, and 0 food. This means you get 1 wood and 3 food. Does this offer work for you?'
Example Output: Yes

Example Input: Context: 'It's nice to know the firewood is not important to your camping trip. I'm glad I can have all the firewood to myself. How do we get to share the other resources. ' 'Actually, I think I may need more food than water. How about I take the food and we can split the water. You may have 2 waters, if you need them.' 'Sure then. You can take all the food. It's not really a priority to me. '
Utterance: 'Great. So if I have three food and one water, you can have three firewood and two water. Would that work for your trip?'
Example Output:
No