['bookcorpus', 'wikipedia']
['pytorch', 'tf', 'jax', 'safetensors', 'bert', 'fill-mask', 'en', 'dataset:bookcorpus', 'dataset:wikipedia', 'arxiv:1810.04805', 'transformers', 'license:apache-2.0', 'autotrain_compatible', 'has_space']