 Complete the following phrase:  Kozák has competed since the late 2000s. She won a silver medal in the K-4 500 m event at the 2008 Summer Olympics in Beijing. Kozák then won a gold medal at the London Olympics in the Kayak Four K4 500m team event with Gabriella Szabó, Katalin Kovács and Krisztina Fazekas Zur for Hungary. She also won the gold medal in the Kayak Single K1 500m. She won three gold medals in the Kayak Single K1 500m, Kayak Pairs K2 500m and 