 from here:
                                            https://huggingface.co/transformers/pretrained_models.html
                                       or a community-uploaded BERT model from here:
                                           https://huggingface.co/models
                               Example values:
                                 bert-base-multilingual-cased:  Multilingual BERT (157 languages) - this is the default
                                 bert-base-cased:  English BERT
        