Complex sentence: Bette Claire Graham (23 March 1924--12 May 1980) was an American typist, commercial artist, the inventor of Liquid Paper, and mother of musician and producer Michael Nesmith.
Split into simpler sentences: Bette Claire Graham (23 March 1924--12 May 1980) was an American typist, commercial artist, and the inventor of Liquid Paper. She was also the mother of musician and producer Michael Nesmith.