Complex sentence: Her father was Russell C. Menzer (1916-1999), an M-G-M and Warner Brothers Commercial Artist/Art Director and she has a younger brother, Stephen, and an older sister, Jean.
Split into simpler sentences: Her father was Russell C. Menzer (1916-1999), an M-G-M and Warner Brothers commercial artist and art director. She has a younger brother, Stephen, and an older sister, Jean.