code: def get_vocab(file_path):
      vocab = set()
      tokker = re.compile(r"([^ ()]+)\)")
      with codecs.open(file_path) as f:
          for line in f:
              for match in tokker.finditer(line.strip()):
                  vocab.add(match.group(1))
      return vocab
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_vocab(file_path) and returns: vocab