class_docstr: - Use ROUGE-2 as [PaLM 2](https://ai.google/static/documents/palm2techreport.pdf)
  - Use Mecab tokenizer for Japanese eval
code: def __init__(self, **kwargs):
      super().__init__(**kwargs)
      from . import MecabTokenizer
  
      self.tokenizer = MecabTokenizer()
  
imports: import os
  import inspect
  from lm_eval.utils import rouge2_mecab
  from lm_eval.base import rf, Task
label_desc: Use image node_id 1 to create a new XLSumJa object from inherited base classes: Task with example: obj = XLSumJa()