Is it possible to predict sentiment of unlabelled dataset using BERT? I have a large unlabeled dataset and I want to predict sentiment for each document in this dataset. I want to know, is it possible that I can use BERT for sentiment analysis of unlabeled data? I have seen so many tutorials and read the blog posts but I couldn't find one. All shows the use of BERT on datasets that are already labeled such as the IMDB review dataset or Yelp review.
Bert is a pre-trained language model with objectives like masked token prediction and next sentence prediction. So, it doesn't have any setup to do sentiment analysis,but you can use the pre-trained information to do the same.
There are couple of ways to solve your problem, they are

Annotate few of your documents and fine-tune the model for sentiment analysis.
Get open-source sentiment analysis datasets which fit your requirement, train Bert on the data and use the same classifier for your purpose (But this will work only if both data distributions look the same).