Complex sentence: Kiselyov was a "pioneering" television journalist in Russia in the 1990s after the dissolution of the Soviet Union, and in 1997, the "New York Times" described him as "Russia's most prominent television journalist".
Split into simpler sentences: Kiselyov was a "pioneering" television journalist in Russia in the 1990s after the dissolution of the Soviet Union. In 1997, the "New York Times" described him as "Russia's most prominent television journalist".