Complex sentence: Henri Nannen (December 25,1913 in Emden--October 13,1996 in Hanover) was a wartime Nazi propagandist, before be became one of the most prominent journalists and magazine publishers in Germany.
Split into simpler sentences: Henri Nannen (December 25,1913 in Emden--October 13,1996 in Hanover) was a German journalist and wartime Nazi propagandist. He became one of the most prominent journalists and magazine publishers in Germany.