code: def _bigpatent_clean_abstract(text):
      """Cleans the abstract text."""
      text = re.sub(r"[\(\{\[].*?[\}\)\]]", "", text).strip()
      text = _remove_excessive_whitespace(text)
      return text
  
imports: import json
  import os
  import re
  from etils import epath
  import tensorflow_datasets.public_api
label_desc: Use image node_id 3 for calling a global function with example usage: _bigpatent_clean_abstract(text) and returns: text