{
  "aa_cls_token": "<cls_aa>",
  "aa_eos_token": "<eos_aa>",
  "aa_mask_token": "<mask_aa>",
  "aa_unk_token": "<unk_aa>",
  "struct_cls_token": "<cls_struct>",
  "struct_eos_token": "<eos_struct>",
  "struct_mask_token": "<mask_struct>",
  "struct_unk_token": "<unk_struct>",
  "pad_token": "<pad>"
}