code: def doc_to_target(self, doc):
      return " " + doc["text"].rsplit(" ", 1)[1]
  
imports: from lm_eval.base import Task, rf
  from lm_eval.metrics import mean, perplexity
label_desc: Use image node_id 7 for calling the LambadaBase obj's underlying member method code with example usage: obj.doc_to_target(doc) and returns: unknown