 Complete the following phrase:  Ronald Verch born 10 February 1986 is a German sprint canoeist who has been competing since the late 2000s. He won a complete set of medals at the ICF Canoe Sprint World Championships with a gold in the C-1 5000 m 2010, a silver in the C-4 1000 m 2009, and a bronze in the C-4 1000 m 