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, what would you like for the packages?'
Utterance: 'we are cold and hungry so we need firewood and food the most, what about you?'
Example Output: Yes

Example Input: Context: 'Hi there! How are you?' 'Great! I'm very excited to go camping, how about you?' 'I am! Now, I need a lot of firewood because we were planning on burning some earlier (to start cooking meals and such). I also need some extra food in case bugs come and eat some (like last trip, ugh). How about I take 2 firewood, 2 food, and you take 3 water, 1 firewood, and 1 food?'
Utterance: 'Would you be open to taking 1 less firewood, I would give you 1 food for it. The weather is supposed to be extra chilly and we did not bring warm enough sleeping bags so we need the extra firewood to avoid freezing to death!'
Example Output: Yes

Example Input: Context: 'I need the food and water.  You can have all the firewood.' 'hello how are you?  I need the food the most because I ran off and left mine sitting on my kitchen counter.  I think we can agree upon you having 2 water but I need 2 food' 'I'm going hiking, and I really need food, it works up an appetite.'
Utterance: 'Well I didn''t bring any with me so I really need two.  I am willing to give you 2 waters.🙂'
Example Output:
Yes