Complex sentence: Kudryavtseva began competitive gymnastics at an early age, she has won junior national competitions in Russia, including the national junior championships in 2009 Dmitrov, 2011 Samara and 2012 in Kazan.
Split into simpler sentences: Kudryavtseva began competitive gymnastics at an early age. She won junior national competitions in Russia, including the national junior championships in 2009 Dmitrov, 2011 Samara and 2012 in Kazan.