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: 'Well I planned on spending a few extra days here at this camping site with my family so the extra water will really come in handy for me over the next few days.  I can offer you an extra package of firewood to keep the 3 packages of water.' 'That makes total sense.  I will let you keep all 3 of the water packages.  If I take the extra firewood for all 3 packages then I can probably boil a lot of the water to get the harmful bacteria out.  I really appreciate your generosity 🙂.  ' 'No problem.🙂  So I will keep the 3 packages of water and, since I am giving you all 3 packages of the firewood I will take back the 1 food package and keep all 3 of the food packages.'
Utterance: 'I would still like at least 1 package of the food please.  There has been a lot of rain in the area, but I think some poisonous mushrooms maybe prevalent in the area, so to be extra cautious I would like a little spare food on hand.'
Example Output: Yes

Example Input: Context: 'Okay . How much You need each?' '3 Food and 1 Firewood? You get the rest?' 'That's fine.I will accept your deal.Tell me the reason why you need the item?'
Utterance: 'Food for the family, and firewood is a good tool to purify water and cook. Also wanted to make a win-win deal'
Example Output: Yes

Example Input: Context: 'What is your offer on the additional packages?' 'I would be willing to give you all of the firewood (3) and two of the water (2) while I get the rest' 'Ok great, are you going to be ok with getting your own water and firewood during the trip?'
Utterance: 'I think that I will be able to, so I'd like to offer you those extras.🙂'
Example Output:
No