Complex sentence: Her 42 movies during the 1930s and 1940s grossed more than $100 million and she set a record of 12 consecutive years in the top 10 of box office stars.
Split into simpler sentences: Her 42 movies during the 1930s and 1940s grossed more than $100 million. She set a record of 12 consecutive years in the top 10 of box office stars.