projection head is now two layers and that will be much easier than calling the projection head three layers but we leave one layer and we train from the middle layers in any case they have this layer additional layer right here compared to the old sim clear and then the representation of that goes into supervised fine-tuning now this is pretty easy this is exactly what it sounds like so now you use only only the dataset that has labels so the part of the data set that has labels and you do the fine tuning and fine tuning is