Complex sentence: Dutch Nationals 2005, German Open 2006, Belgian Open 2006, Dutch Open 2006, German Open 2007 and Dutch Open 2007 which makes him one of the most successful cubers ever.
Split into simpler sentences: Dutch Nationals 2005, German Open 2006, Belgian Open 2006, Dutch Open 2006, German Open 2007 and Dutch Open 2007. All this makes him one of the most successful cubers ever.