Complex sentence: Among the famous performers who worked there were the clowns Karandash, Oleg Popov, and Yury Nikulin, who managed the company for fifteen years and whose name it has borne since his death in 1997.
Split into simpler sentences: Among the famous performers who worked there were the clowns Karandash, Oleg Popov, and Yury Nikulin. Nikulin managed the company for fifteen years, and it has borne his name since his death in 1997.