docs: def authors_titles_validator(record, result):
      """Compute a validation score for the possible match.
  
      The score is based on a similarity score of the authors sets and the maximum Jaccard index found between 2 titles:
      one from the record and one from the result title sets.
  
      If the computed score is higher than 0.5, then the match is valid, otherwise it is not.
  
      Args:
          record (dict): the given record we are trying to match with similar ones in INSPIRE.
          result (dict): possible match returned by the ES query that needs to be validated.
  
      Returns:
          bool: validation decision.
  
      """
      record_authors = get_value(record, 'authors', [])
      result_authors = get_value(result, '_source.authors', [])
  
      author_score = compute_author_match_score(record_authors, result_authors)
  
      title_max_score = 0.0
      record_titles = get_value(record, 'titles.title', [])
      result_titles = get_value(result, '_source.titles.title', [])
  
      for cartesian_pair in product(record_titles, result_titles):
          record_title_tokens = get_tokenized_title(cartesian_pair[0])
          result_title_tokens = get_tokenized_title(cartesian_pair[1])
          current_title_jaccard = compute_jaccard_index(record_title_tokens, result_title_tokens)
  
          if current_title_jaccard > title_max_score and current_title_jaccard >= 0.5:
              title_max_score = current_title_jaccard
  
      return (author_score + title_max_score) / 2 > 0.5