Complex sentence: Leah Chase (1923 -) also known as the "Queen of Creole Cuisine", is a New Orleans chef, author and television personality who has promoted African American art and Creole cooking.
Split into simpler sentences: Leah Chase (1923 -) is a New Orleans chef, author and television personality. Known as the "Queen of Creole Cuisine", Chase has promoted African American art and Creole cooking.