Complex sentence: Sergei Aleksandrovich Volkov (Russian: Сергей Александрович Волков, born April 1,1973, in Chuhuiv, Ukrainian SSR, Soviet Union) is a Russian cosmonaut and is the first second-generation cosmonaut (and space walker), the son of cosmonaut Aleksandr Volkov.
Split into simpler sentences: Sergei Aleksandrovich Volkov (Russian: Сергей Александрович Волков, born April 1,1973, in Chuhuiv, Ukrainian SSR, Soviet Union) is a Russian cosmonaut. Volkov is the first second-generation cosmonaut (and space walker), the son of cosmonaut Aleksandr Volkov.