 Complete the following phrase:  Aleksandr Vauchetskiy born 13 July 1985 is a Belarusian sprint canoeist who has been competing since 2005. He has won seven medals at the ICF Canoe Sprint World Championships with four golds C-4 200 m: 2009, C-4 500 m: 2006, C-4 1000 m: 2009, 2010, two silvers C-4 200 m: 2006, C-4 500 m: 