code: def doc_to_target(self, doc):
      return " " + ["no", "yes"][doc["label"]]
  
imports: import numpy
  from collections import defaultdict
  from lm_eval.base import rf, Task
label_desc: Use image node_id 9 for calling the MCTACO obj's underlying member method code with example usage: obj.doc_to_target(doc) and returns: unknown