Complex sentence: She started her newspaper career in the 1940's at the former daily newspaper, "The Grafton Sentinel", where she became Editor at a young age of 20 years in 1946, and served in that capacity for six years.
Split into simpler sentences: She started her newspaper career in the 1940's at the former daily newspaper, "The Grafton Sentinel". In 1946 she became Editor at a young age of 20 years and served in that capacity for six years.