docs: def _parse_title_url(html_chunk):
      """
      Parse title/name of the book and URL of the book.
  
      Args:
          html_chunk (obj): HTMLElement containing slice of the page with details.
  
      Returns:
          tuple: (title, url), both as strings.
      """
      url = None
      title_tags = html_chunk.match(
          ["div", {"class": "polozka_nazev"}],
          ["a", None, has_param("href")]
      )
  
      if not title_tags:
          return _parse_alt_title(html_chunk), _parse_alt_url(html_chunk)
  
      title = title_tags[0]
  
      url = normalize_url(BASE_URL, title.params["href"])
      title = title.getContent()
  
      if not title:
          title = _parse_alt_title(html_chunk)
  
      return title, url