code: def is_empty(x, tokenizer):
      return len(tokenizer.text_to_tokens(x.strip())) < 1
  
file_path: NeMo/scripts/nlp_language_modeling/niv2/preprocess_niv2.py
imports: import json
  import os
  import re
  from argparse import ArgumentParser
  from multiprocessing import Pool
  from sacremoses import MosesDetokenizer
  from nemo.collections.common.tokenizers import AutoTokenizer
label_desc: Use image node_id 3 for calling a global function with example usage: is_empty(x, tokenizer) and returns: unknown