Complex sentence: John Glad (December 31,1941--December 4,2015) was an American academic who specialized in the literature and politics of exile, especially Russian literature; he has written about Nazi Germany, World War II and the Holocaust.
Split into simpler sentences: John Glad (December 31,1941--December 4,2015) was an American academic who specialized in the literature and politics of exile, especially Russian literature. He had written about Nazi Germany, World War II and the Holocaust.