code: def construct_requests(self, doc, ctx):
      ll, is_prediction = rf.loglikelihood(ctx, doc["completion"])
      return is_prediction
  
imports: from lm_eval.base import Task, rf
  from lm_eval.metrics import mean
label_desc: Use image node_id 11 for calling the Arithmetic obj's underlying member method code with example usage: obj.construct_requests(doc, ctx) and returns: is_prediction