code: def get_tokens(self, sentences):
      if not isinstance(sentences, list):
          sentences = [sentences]
      final_sentences = []
      for _, sentence in enumerate(sentences):
          tokens = tokenize(sentence)
          final_sentences.append(tokens)
  
      return final_sentences
  
file_path: mmf/tools/scripts/visual_dialog/build_imdb.py
imports: import argparse
  import glob
  import json
  import os
  from mmf.utils.text import tokenize
label_desc: Use image node_id 6 for calling the IMDBBuilder obj's underlying member method code with example usage: obj.get_tokens(sentences) and returns: final_sentences