Complex sentence: Charles Edison (August 3,1890--July 31,1969) was son of Thomas Edison to Mina, businessman, Assistant and then United States Secretary of the Navy, and served as the 42nd Governor of New Jersey.
Split into simpler sentences: Charles Edison (August 3,1890--July 31,1969) was the son of Thomas Edison to Mina. He was a businessman, who became Assistant and then United States Secretary of the Navy, and served as the 42nd Governor of New Jersey.