code: def find_matches(self, list_title):
          
          list_title_matches = []
          # Generate every possible tuple of titles and safe the matched string in a list.
          for a, b, in itertools.combinations(list_title, 2):
              if a == b:
                  list_title_matches.append(a)
  
          return list_title_matches
docs: Checks if there are any matches between extracted titles.
  
          :param list_title: A list, the extracted titles saved in a list
          :return: A list, the matched titles