Complex sentence: In 1926, having made friends with important figures in the Negro Awakening that became the Harlem Renaissance, Larsen gave up her work as a librarian and began to work as a writer active in the literary community.
Split into simpler sentences: In 1926, having made friends with important figures in the Negro Awakening that became the Harlem Renaissance, Larsen gave up her work as a librarian. She began to work as a writer active in the literary community.