code: def get_and_set_parenthesis(self):
      all_parenthesis = []
      for page in self.pages:
          if page.relations.title_parenthesis_norm is not None:
              all_parenthesis.extend(
                  page.relations.title_parenthesis_norm
              )
          if page.relations.title_parenthesis is not None:
              all_parenthesis.extend(page.relations.title_parenthesis)
      return set(all_parenthesis)
  
file_path: nlp-architect/nlp_architect/data/cdc_resources/data_types/wiki/wikipedia_pages.py
label_desc: Use image node_id 7 for calling the WikipediaPages obj's underlying member method code with example usage: obj.get_and_set_parenthesis() and returns: set