Complex sentence: He left the Soviet Union in 1988 and settled in Denmark where he worked for a national daily newspaper Ekstra Bladet in Copenhagen for over two decades and also served as a Moscow correspondent (2004--2011).
Split into simpler sentences: He left the Soviet Union in 1988 and settled in Denmark where he worked for a national daily newspaper Ekstra Bladet in Copenhagen for over two decades. He also served as Ekstra Bladet's Moscow correspondent (2004--2011).