ml_engine/saved-model/special_tokens_map.json

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