special_tokens_map.json

{
  "unk_token": "[UNK]",
  "sep_token": "[SEP]",
  "pad_token": "[PAD]",
  "cls_token": "[CLS]",
  "mask_token": {
    "content": "[MASK]",
    "single_word": false,
    "lstrip": false,
    "rstrip": false,
    "normalized": true
  }
}