code: def _generate_examples(self, data_file):
      
      target_language = self.builder_config.target_language
  
      with tf.io.gfile.GFile(data_file) as f:
        for i, line in enumerate(f):
          line_parts = line.strip().split("\t")
          if len(line_parts) != 2:
            raise ValueError(("Wrong data format in line {}. The line '{}' does "
                              "not have exactly one delimiter.").format(i, line))
          source, target = line_parts[0].strip(), line_parts[1].strip()
  
          yield {"en": source, target_language: target}
docs: This function returns the examples in the raw (text) form.