class_docstr: Allows to filter such that only examples where no passage was selected are used.
class_docstr_tok: ["Allows","to","filter","such","that","only","examples","where","no","passage","was","selected","are","used","."]
docstr: Return if checked sentence is filtered.
docstr_tok: ["Return","if","checked","sentence","is","filtered","."]
code: def fails(self, sentences: str) -> bool:
      """
      Return if checked sentence is filtered.
      """
      return sentences != "no_passages_used"
  
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 1 for calling the WowOnlyNoPassageUsed obj's underlying member method code with example usage: obj.fails(sentences) and returns: unknown