BERT embeddings for Amazon Movie reviews

Related code:
https://github.com/EML4U/amore/commit/1fa6f91886b5a46b3f90bf4054fcc85194c59ddd

Source input file:
amazon_raw.pickle
https://hobbitdata.informatik.uni-leipzig.de/EML4U/2022-02-05-DriftExplanationPaper/