code: def doc_to_text(self, doc):
      return doc["source"]
  
imports: import os
  import numpy
  import datasets
  from lm_eval.base import rf, Task
  from lm_eval.metrics import mean
  from lm_eval.utils import rouge2_mecab
label_desc: Use image node_id 8 for calling the Wikilingua obj's underlying member method code with example usage: obj.doc_to_text(doc) and returns: doc