class_docstr: Allows to filter any examples where no passage was selected to base the wizard reply
  on.
class_docstr_tok: ["Allows","to","filter","any","examples","where","no","passage","was","selected","to","base","the","wizard","reply","on","."]
code: def many_episode_mutation(self, episode):
      out_episodes = []
      for e in episode:
          checked_sentences = e.get("checked_sentence")
          if self.fails(checked_sentences):
              pass
          else:
              out_episodes.append([e])
      return out_episodes
  
imports: from parlai.core.mutators import register_mutator, MessageMutator, ManyEpisodeMutator
  from parlai.core.message import Message
  import parlai.tasks.wizard_of_internet.constants
  import random
label_desc: Use image node_id 2 for calling the WowFilterNoPassageUsed obj's underlying member method code with example usage: obj.many_episode_mutation(episode) and returns: out_episodes