Complex sentence: Ernest Henry Gruening (February 6,1887--June 26,1974) was an American journalist and Democrat who was the Governor of the Alaska Territory from 1939 until 1953, and a United States Senator from Alaska from 1959 until 1969.
Split into simpler sentences: Ernest Henry Gruening (February 6,1887--June 26,1974) was an American journalist and politician. A member of the Democratic Party, Gruening was the Governor of the Alaska Territory from 1939 until 1953, and a United States Senator from Alaska from 1959 until 1969.