code: def clear_all(self):
          
          logger.info("Clearing ALL Mentions.")
          self.session.query(Mention).delete(synchronize_session="fetch")
  
          # With no Mentions, there should be no Candidates also
          self.session.query(Candidate).delete(synchronize_session="fetch")
          logger.info("Cleared ALL Mentions (and Candidates).")
docs: Delete all Mentions from given split the database.