class_docstr: 4 languages fill-in-the-blanks text-to-text problem.
class_docstr_tok: ["4","languages","fill-in-the-blanks","text-to-text","problem","."]
code: def inputs_prefix(self):
      return "wiki fill "
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import six
  from tensor2tensor.data_generators import generator_utils
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_problems
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 6 for calling the LanguagemodelDeEnFrRoWiki64kFitbPacked1k obj's underlying member method code with example usage: obj.inputs_prefix() and returns: str